按下时更改UIButton的位置

Question

按下时，我在随机位置移动UIButton时出现问题。练习是制作一个应用程序，用于统计按钮上的按键。在每次点击时，按钮必须改变其在屏幕上的位置。这是我的代码：

@implementation ViewController 


- (void)viewDidLoad { 
    [super viewDidLoad]; 
} 


- (IBAction)buttonPressed:(id)sender { 

    //[self tapCountMethod]; 

} 

- (IBAction)button:(UIButton *)sender { 
    UIButton *button = (UIButton *)sender; 

    int xmin = ([button frame].size.width)/2; 
    int ymin = ([button frame].size.height)/2; 

    int x = xmin + arc4random_uniform(self.view.frame.size.width - button.frame.size.width); 
    int y = ymin + arc4random_uniform(self.view.frame.size.height - button.frame.size.height); 


    [button setCenter:CGPointMake(x, y)]; 
    [button addTarget:self action: @selector(buttonPressed:) forControlEvents: UIControlEventTouchUpInside]; 

} 

- (void) tapCounter { 

    tapCount ++; 
    labelCount.text = [NSString stringWithFormat:@"%ld times", (long)tapCount]; 
} 


@end 

因此，当我在buttonpressed中调用tapCount方法时，按钮停止移动。有人可以告诉我为什么会发生这种情况，以及我错了什么。你有什么建议请告诉我。我必须在哪里调用count方法？

Answer 1

因此，经过多次尝试和研究，我找到了解决方案。这是我最后的代码。

@implementation ViewController 

- (void)viewDidLoad { 

    [super viewDidLoad]; 
    self.button.imageView.animationImages = 
    [NSArray arrayWithObjects:[UIImage imageNamed:@"image1.png"], 
    [UIImage imageNamed:@"image2.png"], 
    nil]; 
    self.button.imageView.animationDuration = 0.7; //whatever you want (in seconds) 
    [self.button.imageView startAnimating]; 
    self.labelCount.textColor = [UIColor colorWithRed:64./255. green:64./255. blue:64./255. alpha:1.]; 

} 

- (void)viewDidAppear:(BOOL)animated { 

    [super viewDidAppear:animated]; 

} 


- (IBAction)buttonPressed:(id)sender { 
    NSInteger counter = self.tapCount; 
    if (counter > 0) 
     [self.labelCount setText:[NSString stringWithFormat:@"%ld",((long)counter + 1)]]; 
    self.tapCount ++; 
    NSLog(@"%ld",(long)self.tapCount); 

} 

- (IBAction)button:(UIButton *)sender { 

    int xmin = ([self.button frame].size.width)/2; 
    int ymin = ([self.button frame].size.height)/2; 

    int x = xmin + arc4random_uniform(self.view.frame.size.width - self.button.frame.size.width); 
    int y = ymin + arc4random_uniform(self.view.frame.size.height - self.button.frame.size.height); 


    [self.button setCenter:CGPointMake(x, y)]; 
    [self.button addTarget:self action: @selector(buttonPressed:) forControlEvents: UIControlEventTouchUpInside]; 
    [self.labelCount setText:[NSString stringWithFormat:@"1"]]; 
} 

- (BOOL)prefersStatusBarHidden { 

    return YES; 

} 

@end 

谢谢大家