iphone - iphone 应用程序中的 uigesturerecognizer

Question

您好，我想模拟长按按钮？我怎样才能做到这一点？我认为需要一个计时器。你能帮助我吗？我看到 UILongPressGestureRecognizer 但我该如何使用这种类型？

这是代码，不能识别长按

UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPress:)];
[self.button addGestureRecognizer:longPress];
[longPress release];

- (void)longPress:(UILongPressGestureRecognizer*)gesture {
    if ( gesture.state == UIGestureRecognizerStateEnded ) {
         NSLog(@"Long Press");
    }
}

Answer 1

为了利用 UILongPressGestureRecognizer，您必须设置 minimumPressDuration 属性。这指定等待多长时间，直到您的手势识别器被触发。例如

UILongPressGestureRecognizer *longPress = [[[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPress:)] autorelease];
longPress.minimumPressDuration = 2.0f;
[self.button addGestureRecognizer:longPress];

- (void)longPress:(UILongPressGestureRecognizer*)gesture {
    if ( gesture.state == UIGestureRecognizerStateEnded ) {
         NSLog(@"Long Press");
    }
}