是否可以動畫UIButtonStyleCustom類型的UIButton的寬度？

Question

我有一個框架大小的動畫，當UIButton是UIButtonTypeRoundedRect時可以正常工作。但是當我在背景圖像中使用UIButtonStyleCustom時沒有明顯的影響。我的動畫代碼在這裏：

[UIView beginAnimations:@"MyAnimation" context:nil]; 
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut]; 
[UIView setAnimationDuration:0.25]; 
CGRect tempFrame = myButton.frame; 
tempFrame.size.width = tempFrame.size.width + 100.0f; 
myButton.frame = tempFrame; 
[UIView commitAnimations]; 

感謝您的幫助！

Answer 1

嘿傢伙，我終於解決了我的問題。我分類UIView並添加了兩個UIImageView s和一個UIButton它。動畫現在非常好！

下面是代碼：

.H

#import <UIKit/UIKit.h> 

@interface NNAnimatableButton : UIView { 

    UIImageView *backgroundImageView; 
    UIImageView *imageView; 
    UIButton *button; 
} 

@property (nonatomic, retain) UIImageView *backgroundImageView; 
@property (nonatomic, retain) UIImageView *imageView; 
@property (nonatomic, retain) UIButton *button; 

@end 

.M

#import "NNAnimatableButton.h" 

@implementation NNAnimatableButton 

@synthesize backgroundImageView, imageView, button; 

- (id)initWithFrame:(CGRect)frame { 
    if ((self = [super initWithFrame:frame])) { 

     CGRect rect = CGRectMake(0.0f, 0.0f, frame.size.width, frame.size.height); 

     NSUInteger autoresizingMask = UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleBottomMargin; 

     // Initialization code. 
     backgroundImageView = [[UIImageView alloc] initWithFrame:rect]; 
     backgroundImageView.autoresizingMask = autoresizingMask; 

     imageView = [[UIImageView alloc] initWithFrame:rect]; 
     imageView.autoresizingMask = autoresizingMask; 
     imageView.contentMode = UIViewContentModeCenter; 

     button = [UIButton buttonWithType:UIButtonTypeCustom]; 
     button.autoresizingMask = autoresizingMask; 
     [button setFrame:rect]; 

     [self addSubview:backgroundImageView]; 
     [self addSubview:imageView]; 
     [self addSubview:button]; 

     [backgroundImageView release]; 
     [imageView release]; 
    } 
    return self; 
} 

- (void)dealloc { 

    [backgroundImageView release]; 
    [imageView release]; 
    [button release]; 

    [super dealloc]; 
} 

@end 

Answer 2

我試過你的例子在我的XCode。兩個按鈕都可以正常工作。所以一些額外的問題...你使用Background或Image？什麼是視圖模式（Scale to Fill或其他）？你在哪裏測試你的應用程序（設備或模擬器，iPhone 3或iPhone 4或...）？

也做一些檢查。檢查myButton是否連接到IB（也許，你已經創建了一個新的按鈕，並忘記這麼做）。檢查這段代碼是否運行（也許，你忘記了連接到必要的觸摸操作）。