ios - 在 UIAlertView 上检测 Yes 和 No

Question

在我的 handleLongHeld: 中，

我有以下行

  if(Users_pressed_ok) // How do I do this?

我可以检测到何时按下了 okay，正如您所见，第二种方法将其记录到日志中，我可以看到它正在运行。但是，我想不出一种干净的方法来执行上述 if 语句。

我能想到的唯一方法是使用针对此警报更新的全局变量。

-  (void)handleLongHold:(UILongPressGestureRecognizer*)sender {
    if (sender.state == UIGestureRecognizerStateEnded) {
        NSLog(@"Long press Ended");
    } else if (sender.state == UIGestureRecognizerStateBegan) {
        NSLog(@"Long press detected.");

        NSLog(@"long press ");
        UIImageView *myImage = (UIImageView *)sender.view;
        UIImage *tmpImage = [UIImage imageNamed: @"cancel.png"];

        UIAlertView *alert = [[UIAlertView alloc]
                              initWithTitle: @"Announcement"
                              message: @"It turns out that you are playing Addicus!"
                              delegate: self
                              cancelButtonTitle:@"Cancel"
                              otherButtonTitles:@"OK",nil];
        [alert show];
        if(Users_pressed_ok) // How do I do this?
        [myImage removeFromSuperview];
    }

}


- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
    if (buttonIndex == 0) {
        NSLog(@"user pressed OK");
    }
    else {
        NSLog(@"user pressed Cancel");
    }
}

Answer 1

在您释放按钮后，将触发警报 View 委托(delegate)。试试这个

-  (void)handleLongHold:(UILongPressGestureRecognizer*)sender {
    if (sender.state == UIGestureRecognizerStateEnded) {
        NSLog(@"Long press Ended");
    } else if (sender.state == UIGestureRecognizerStateBegan) {
        NSLog(@"Long press detected.");

        NSLog(@"long press ");
        UIImageView *myImage = (UIImageView *)sender.view;
        UIImage *tmpImage = [UIImage imageNamed: @"cancel.png"];

        UIAlertView *alert = [[UIAlertView alloc]
                              initWithTitle: @"Announcement"
                              message: @"It turns out that you are playing Addicus!"
                              delegate: self
                              cancelButtonTitle:@"Cancel"
                              otherButtonTitles:@"OK",nil];
        [alert show];
    }

}


- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
    if (buttonIndex == 0) {
        NSLog(@"user pressed OK");
        [myImage removeFromSuperview];
    }
    else {
        NSLog(@"user pressed Cancel");
    }
}