iphone - 如何通过 longPressGestureRecognizer 获取 button.tag？

Question

我正在动态地将图像按钮添加到一些滚动视图中。它们都指向一个 longPressHandler。现在，我如何知道按下了哪个按钮？[sender tag] 给了我添加到按钮的 longGestureRecognizer 的标签，我无法手动设置该标签。

for (...) {
    UIButton *button = [[UIButton alloc] init];
    button.tag = w + h * 3; 
    [button addTarget:self action:@selector(imageButtonPressed:) forControlEvents:UIControlEventTouchUpInside];
    UILongPressGestureRecognizer *gest = [[UILongPressGestureRecognizer alloc]
                initWithTarget:self action:@selector(imageButtonLongPress:)];
    gest.minimumPressDuration = 1;
    gest.delegate = self;

    [button addGestureRecognizer:gest];
    [gest release];

    [scrollView addSubview:button];
    [button release];
}

- (void) imageButtonLongPress:(id)sender {  
    // how to get button tag here?
}

Answer 1

有一个view属性UIGestureRecognizer返回识别器附加到的视图。我认为这是你最好的选择。

- (void) imageButtonLongPress:(id)sender {  
    UIGestureRecognizer *recognizer = (UIGestureRecognizer*) sender;
    int tag = recognizer.view.tag;
}

Answer 2

在您的操作中，您必须以手势输入发送者，然后输入将其视图转换为按钮，然后将按钮的标签设为 -

UILongPressGestureRecognizer *gest = (UILongPressGestureRecognizer *)sender;
UIButton *button = (UIButton*)[gest view];
NSLog(@"%d",[button tag]);