我有一个UIView的子类,并添加了touchesBegan和touchesEnd方法……
在touchesBegan中,我通过在touchesEnd中使用self.backgroundColor = [UIColor greenColor] …将backgroundColor从白色设置为绿色,并将颜色重置为白色.
它工作但很慢.通过点击视图,它需要0.5 – 1.0秒,直到我看到绿色.
在UITableView中选择一个单元格要快得多.
解决方法
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：它会更快地工作.