iOS8:取消外部点击的表单

Question

我们目前使用的解决方案与这里提到的解决方案类似（请参阅Ares的回答）。这在iOS8中似乎不起作用。

我有一个表单，当用户点击表单后面的灰色视图时，我想立即将其关闭。以前，这似乎可以通过在窗口中添加手势识别器，并检查点击位置以查看它是否在当前表单之外来实现；

我还注意到需要转换的点（开关x和y）的设备是在横向模式下使用的。除此之外，现在它只接收来自表单内部的手势，在表单内部，屏幕上任何地方的任何点击手势都会触发事件。

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.recognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTapBehind:)];
    self.recognizer.numberOfTapsRequired = 1;
    self.recognizer.cancelsTouchesInView = NO;
    [self.view.window addGestureRecognizer:self.recognizer];
}
- (void)handleTapBehind:(UITapGestureRecognizer *)sender
{
    if (sender.state == UIGestureRecognizerStateEnded)
    {
        CGPoint location = [sender locationInView:nil];
        if (UIInterfaceOrientationIsLandscape([UIApplication sharedApplication].statusBarOrientation) && IOS8)
        {
            location = CGPointMake(location.y, location.x);
        }
        // if tap outside pincode inputscreen
        BOOL inView = [self.view pointInside:[self.view convertPoint:location     fromView:self.view.window] withEvent:nil];
        if (!inView)
        {
            [self.view.window removeGestureRecognizer:sender];
            [self dismissViewControllerAnimated:YES completion:nil];
        }
    }
}

Answer 1

正如您引用的线程中所提到的，您应该添加一个UIGestureRecognizerDelegate并实现以下方法：

- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer {
    return YES;
}
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
    return YES;
}
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
    return YES;
}