368 lines
12 KiB
Objective-C
368 lines
12 KiB
Objective-C
/***************************************************************************
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Toast+UIView.h
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Toast
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Version 0.1
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Copyright (c) 2011 Charles Scalesse.
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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***************************************************************************/
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#import "Toast+UIView.h"
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#import <QuartzCore/QuartzCore.h>
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#import <objc/runtime.h>
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#define kMaxWidth 0.8
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#define kMaxHeight 0.8
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#define kHorizontalPadding 10.0
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#define kVerticalPadding 10.0
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#define kCornerRadius 10.0
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#define kOpacity 0.8
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#define kFontSize 16.0
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#define kMaxTitleLines 999
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#define kMaxMessageLines 999
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#define kFadeDuration 0.2
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#define kDefaultLength 3
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#define kDefaultPosition @"bottom"
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#define kImageWidth 80.0
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#define kImageHeight 80.0
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static NSString *kDurationKey = @"duration";
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@interface UIView (ToastPrivate)
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- (CGPoint)getPositionFor:(id)position toast:(UIView *)toast;
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- (UIView *)makeViewForMessage:(NSString *)message title:(NSString *)title image:(UIImage *)image;
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@end
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@implementation UIView (Toast)
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#pragma mark -
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#pragma mark Toast Methods
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- (void)makeToast:(NSString *)message
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{
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[self makeToast:message duration:kDefaultLength position:kDefaultPosition];
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}
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- (void)makeToast:(NSString *)message duration:(float)interval position:(id)point
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{
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UIView *toast = [self makeViewForMessage:message title:nil image:nil];
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[self showToast:toast duration:interval position:point];
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}
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- (void)makeToast:(NSString *)message
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duration:(float)interval
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position:(id)point
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title:(NSString *)title
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{
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UIView *toast = [self makeViewForMessage:message title:title image:nil];
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[self showToast:toast duration:interval position:point];
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}
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- (void)makeToast:(NSString *)message
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duration:(float)interval
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position:(id)point
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image:(UIImage *)image
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{
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UIView *toast = [self makeViewForMessage:message title:nil image:image];
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[self showToast:toast duration:interval position:point];
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}
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- (void)makeToast:(NSString *)message
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duration:(float)interval
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position:(id)point
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title:(NSString *)title
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image:(UIImage *)image
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{
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UIView *toast = [self makeViewForMessage:message title:title image:image];
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[self showToast:toast duration:interval position:point];
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}
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- (void)showToast:(UIView *)toast
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{
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[self showToast:toast duration:kDefaultLength position:kDefaultPosition];
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}
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- (void)showToast:(UIView *)toast duration:(float)interval position:(id)point
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{
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/****************************************************
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* *
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* Displays a view for a given duration & position. *
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* *
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****************************************************/
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CGPoint toastPoint = [self getPositionFor:point toast:toast];
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// use an associative reference to associate the toast view with the display interval
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objc_setAssociatedObject(toast, &kDurationKey, [NSNumber numberWithFloat:interval],
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OBJC_ASSOCIATION_RETAIN);
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[toast setCenter:toastPoint];
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[toast setAlpha:0.0];
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[self addSubview:toast];
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[UIView beginAnimations:@"fade_in" context:toast];
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[UIView setAnimationDuration:kFadeDuration];
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[UIView setAnimationDelegate:self];
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[UIView setAnimationDidStopSelector:@selector(animationDidStop:finished:context:)];
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[UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
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[toast setAlpha:1.0];
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[UIView commitAnimations];
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}
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#pragma mark -
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#pragma mark Animation Delegate Method
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- (void)animationDidStop:(NSString *)animationID finished:(BOOL)finished context:(void *)context
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{
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UIView *toast = (UIView *)context;
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// retrieve the display interval associated with the view
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float interval = [(NSNumber *)objc_getAssociatedObject(toast, &kDurationKey) floatValue];
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if ([animationID isEqualToString:@"fade_in"])
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{
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[UIView beginAnimations:@"fade_out" context:toast];
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[UIView setAnimationDelay:interval];
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[UIView setAnimationDuration:kFadeDuration];
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[UIView setAnimationDelegate:self];
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[UIView setAnimationDidStopSelector:@selector(animationDidStop:finished:context:)];
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[UIView setAnimationCurve:UIViewAnimationCurveEaseIn];
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[toast setAlpha:0.0];
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[UIView commitAnimations];
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}
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else if ([animationID isEqualToString:@"fade_out"])
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{
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[toast removeFromSuperview];
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}
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}
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#pragma mark -
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#pragma mark Private Methods
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- (CGPoint)getPositionFor:(id)point toast:(UIView *)toast
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{
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/*************************************************************************************
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* *
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* Converts string literals @"top", @"bottom", @"center", or any point wrapped in an *
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* NSValue object into a CGPoint *
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* *
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*************************************************************************************/
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if ([point isKindOfClass:[NSString class]])
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{
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if ([point caseInsensitiveCompare:@"top"] == NSOrderedSame)
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{
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return CGPointMake(self.bounds.size.width / 2,
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(toast.frame.size.height / 2) + kVerticalPadding);
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}
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else if ([point caseInsensitiveCompare:@"bottom"] == NSOrderedSame)
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{
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return CGPointMake(self.bounds.size.width / 2,
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(self.bounds.size.height - (toast.frame.size.height / 2)) -
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kVerticalPadding);
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}
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else if ([point caseInsensitiveCompare:@"center"] == NSOrderedSame)
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{
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return CGPointMake(self.bounds.size.width / 2, self.bounds.size.height / 2);
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}
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}
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else if ([point isKindOfClass:[NSValue class]])
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{
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return [point CGPointValue];
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}
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NSLog(@"Error: Invalid position for toast.");
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return [self getPositionFor:kDefaultPosition toast:toast];
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}
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- (UIView *)makeViewForMessage:(NSString *)message title:(NSString *)title image:(UIImage *)image
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{
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/***********************************************************************************
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* *
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* Dynamically build a toast view with any combination of message, title, & image. *
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* *
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***********************************************************************************/
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if ((message == nil) && (title == nil) && (image == nil))
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return nil;
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UILabel *messageLabel = nil;
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UILabel *titleLabel = nil;
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UIImageView *imageView = nil;
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// create the parent view
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UIView *wrapperView = [[[UIView alloc] init] autorelease];
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[wrapperView.layer setCornerRadius:kCornerRadius];
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[wrapperView setBackgroundColor:[[UIColor blackColor] colorWithAlphaComponent:kOpacity]];
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wrapperView.autoresizingMask =
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UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleLeftMargin |
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UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleBottomMargin;
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if (image != nil)
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{
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imageView = [[[UIImageView alloc] initWithImage:image] autorelease];
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[imageView setContentMode:UIViewContentModeScaleAspectFit];
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[imageView
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setFrame:CGRectMake(kHorizontalPadding, kVerticalPadding, kImageWidth, kImageHeight)];
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}
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float imageWidth, imageHeight, imageLeft;
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// the imageView frame values will be used to size & position the other views
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if (imageView != nil)
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{
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imageWidth = imageView.bounds.size.width;
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imageHeight = imageView.bounds.size.height;
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imageLeft = kHorizontalPadding;
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}
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else
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{
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imageWidth = imageHeight = imageLeft = 0;
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}
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if (title != nil)
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{
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titleLabel = [[[UILabel alloc] init] autorelease];
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[titleLabel setNumberOfLines:kMaxTitleLines];
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[titleLabel setFont:[UIFont boldSystemFontOfSize:kFontSize]];
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[titleLabel setTextAlignment:UITextAlignmentLeft];
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[titleLabel setLineBreakMode:UILineBreakModeWordWrap];
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[titleLabel setTextColor:[UIColor whiteColor]];
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[titleLabel setBackgroundColor:[UIColor clearColor]];
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[titleLabel setAlpha:1.0];
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[titleLabel setText:title];
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// size the title label according to the length of the text
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CGSize maxSizeTitle = CGSizeMake((self.bounds.size.width * kMaxWidth) - imageWidth,
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self.bounds.size.height * kMaxHeight);
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CGSize expectedSizeTitle = [title sizeWithFont:titleLabel.font
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constrainedToSize:maxSizeTitle
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lineBreakMode:titleLabel.lineBreakMode];
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[titleLabel setFrame:CGRectMake(0, 0, expectedSizeTitle.width, expectedSizeTitle.height)];
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}
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if (message != nil)
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{
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messageLabel = [[[UILabel alloc] init] autorelease];
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[messageLabel setNumberOfLines:kMaxMessageLines];
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[messageLabel setFont:[UIFont systemFontOfSize:kFontSize]];
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[messageLabel setLineBreakMode:UILineBreakModeWordWrap];
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[messageLabel setTextColor:[UIColor whiteColor]];
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[messageLabel setTextAlignment:UITextAlignmentCenter];
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[messageLabel setBackgroundColor:[UIColor clearColor]];
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[messageLabel setAlpha:1.0];
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[messageLabel setText:message];
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// size the message label according to the length of the text
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CGSize maxSizeMessage = CGSizeMake((self.bounds.size.width * kMaxWidth) - imageWidth,
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self.bounds.size.height * kMaxHeight);
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CGSize expectedSizeMessage = [message sizeWithFont:messageLabel.font
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constrainedToSize:maxSizeMessage
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lineBreakMode:messageLabel.lineBreakMode];
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[messageLabel
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setFrame:CGRectMake(0, 0, expectedSizeMessage.width, expectedSizeMessage.height)];
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}
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// titleLabel frame values
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float titleWidth, titleHeight, titleTop, titleLeft;
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if (titleLabel != nil)
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{
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titleWidth = titleLabel.bounds.size.width;
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titleHeight = titleLabel.bounds.size.height;
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titleTop = kVerticalPadding;
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titleLeft = imageLeft + imageWidth + kHorizontalPadding;
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}
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else
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{
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titleWidth = titleHeight = titleTop = titleLeft = 0;
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}
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// messageLabel frame values
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float messageWidth, messageHeight, messageLeft, messageTop;
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if (messageLabel != nil)
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{
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messageWidth = messageLabel.bounds.size.width;
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messageHeight = messageLabel.bounds.size.height;
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messageLeft = imageLeft + imageWidth + kHorizontalPadding;
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messageTop = titleTop + titleHeight + kVerticalPadding;
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}
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else
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{
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messageWidth = messageHeight = messageLeft = messageTop = 0;
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}
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// compare the title & message widths and use the longer value to calculate the size of the
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// wrapper width the same logic applies to the x value (left)
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float longerWidth = (messageWidth < titleWidth) ? titleWidth : messageWidth;
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float longerLeft = (messageLeft < titleLeft) ? titleLeft : messageLeft;
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// if the image width is larger than longerWidth, use the image width to calculate the wrapper
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// width. the same logic applies to the wrapper height
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float wrapperWidth =
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((longerLeft + longerWidth + kHorizontalPadding) < imageWidth + (kHorizontalPadding * 2))
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? imageWidth + (kHorizontalPadding * 2)
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: (longerLeft + longerWidth + kHorizontalPadding);
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float wrapperHeight =
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((messageTop + messageHeight + kVerticalPadding) < imageHeight + (kVerticalPadding * 2))
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? imageHeight + (kVerticalPadding * 2)
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: (messageTop + messageHeight + kVerticalPadding);
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[wrapperView setFrame:CGRectMake(0, 0, wrapperWidth, wrapperHeight)];
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if (titleLabel != nil)
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{
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[titleLabel setFrame:CGRectMake(titleLeft, titleTop, titleWidth, titleHeight)];
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[wrapperView addSubview:titleLabel];
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}
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if (messageLabel != nil)
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{
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[messageLabel setFrame:CGRectMake(messageLeft, messageTop, messageWidth, messageHeight)];
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[wrapperView addSubview:messageLabel];
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}
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if (imageView != nil)
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{
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[wrapperView addSubview:imageView];
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}
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return wrapperView;
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}
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@end
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