延迟touchesBegan

Question

我有一个UIView子类，并添加了touchesBegan和touchesEnd方法.

在touchesBegan中，我使用self.backgroundColor = [UIColor greenColor]将backgroundColor从白色设置为绿色.在touchesEnd中，我将颜色重置为白色。

它工作得很慢。通过点击视图，我需要0.5秒-1.0秒才能看到绿色。

在UITableView中选择一个单元格要快得多。

Answer 1

试试这个：

self.view.userInteractionEnabled = YES;
    UILongPressGestureRecognizer *recognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(doCallMethod:)];
    recognizer.delegate = self;
    recognizer.minimumPressDuration = 0.0;
    [self.view addGestureRecognizer:recognizer];

- (void)doCallMethod:(UILongPressGestureRecognizer*)sender {
    if(sender.state == UIGestureRecognizerStateBegan){
        NSLog(@"Begin");
        self.view.backgroundColor = [UIColor greenColor];
    }else if (sender.state == UIGestureRecognizerStateEnded){
        NSLog(@"End");
        self.view.backgroundColor = [UIColor whiteColor];
    }
}

注意：会工作得更快。

Answer 2

您应该按照TheBurgerShot的建议使用手势识别器，但我建议您使用UILongPressGestureRecognizer。类似于：

UILongPressGestureRecognizer *gesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(changeColor:)];
gesture.minimumPressDuration = 0.f;
[self.yourView addGestureRecognizer:gesture];

在你的viewDidLoad里。和：

-(void) changeColor:(UIGestureRecognizer *)gestureRecognizer{

    if (gestureRecognizer.state == UIGestureRecognizerStateBegan){
        self.yourView.backgroundColor = [UIColor greenColor];
    }
    else if (gestureRecognizer.state == UIGestureRecognizerStateEnded){
        self.yourView.backgroundColor = [UIColor whiteColor];
    }
}