Question

我在按下时随机移动UIButton时遇到问题。练习是制作一个计算按钮上的水龙头的应用程序。在每次点击时，按钮必须改变他在屏幕上的位置。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，当我按下按钮时调用tapCount方法时，按钮停止移动。有人能告诉我为什么会这样，我错了。你有什么建议请告诉我。我必须在哪里调用计数方法？

Answer 1

因此，经过多次尝试和研究，我找到了解决方案。这是我的最后一个代码。

@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

按下时更改UIButton的位置

1 个答案: