点击按钮后移动图像

Question

我以编程方式在xCode中插入自定义图像（图像）。点击UI按钮后，我想将按钮移动到iPhone屏幕上的自定义位置。

的编程按钮：

self.view = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]]; 

    UIButton *MyButton = [UIButton buttonWithType:nil]; 

    MyButton.frame = CGRectMake(100, 170, 100, 30); 

    [MyButton setImage:[UIImage imageNamed:@"tap.png"] forState:nil]; 

    [self.view addSubview:MyButton]; 

    [MyButton addTarget:self action:@selector(buttonPressed) forControlEvents:UIControlEventTouchUpInside]; 

我试图点击后移动的按钮。

-(void)buttonPressed { 
    NSLog(@"Button Pressed!"); 


    CGRect frame = MyButton.frame; 
    frame.origin.x = 100; // new x coordinate 
    frame.origin.y = 4; // new y coordinate 

    [UIView beginAnimations:nil context:nil]; 
    [UIView setAnimationDuration: 0.1]; 
    MyButton.frame = frame; 
    [UIView commitAnimations]; 

    } 

但是没有发生任何事情。

我的.h文件

IBOutlet UIButton *MyButton; 
@property (nonatomic, retain) UIButton *MyButton; 

Answer 1

这将是更容易使用的UIButton，因为他们已经监听点击事件。否则，您需要在您的UIImageView中添加一个UIGestureRecognizer。一旦你在Interface Builder中设置了你的UIButton并连接到一个IBOutlet，你可以使用这个相同的代码来移动它。

编辑

你的问题可能是你正在创建一个新的按钮，而不是分配给你的myButton的财产。相反的：

UIButton *MyButton = [UIButton buttonWithType:nil]; 

尝试：

MyButton = [UIButton buttonWithType:UIButtonTypeCustom]; // UIButtonTypeCustom is what you would need to properly display your image. If you aren't setting an image for the button yet, then instead try UIButtonTypeRoundedRect.