Iphone SDK通过点击它在ipad上解除模态ViewControllers

问题描述

当用户点击模态视图时，我想解雇一个FormSheetPresentation模式视图控制器...我已经看到一堆应用程序这样做（例如在ipad上的ebay）但我无法弄清楚如何从下面的视图是当模态视图显示为这样时，它们会被触摸禁用（他们可能会将它作为一个弹出窗口显示吗？）......有人有任何建议吗？

I want to dismiss a FormSheetPresentation modal view controller when the user taps outside the modal view...I have seen a bunch of apps doing this (ebay on ipad for example) but i cant figure out how since the underneath views are disabled from touches when modal views are displayed like this (are they presenting it as a popover perhaps?)...anyone have any suggestions?

推荐答案

我迟到了一年，但这非常简单。

I'm a year late, but this is pretty straightforward to do.

让您的模态视图控制器将手势识别器附加到视图窗口：

Have your modal view controller attach a gesture recognizer to the view's window:

UITapGestureRecognizer *recognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTapBehind:)];

[recognizer setNumberOfTapsRequired:1];
recognizer.cancelsTouchesInView = NO; //So the user can still interact with controls in the modal view
[self.view.window addGestureRecognizer:recognizer];
[recognizer release];

处理代码：

- (void)handleTapBehind:(UITapGestureRecognizer *)sender
{
    if (sender.state == UIGestureRecognizerStateEnded)
     {
       CGPoint location = [sender locationInView:nil]; //Passing nil gives us coordinates in the window

 //Then we convert the tap's location into the local view's coordinate system, and test to see if it's in or outside. If outside, dismiss the view.

        if (![self.view pointInside:[self.view convertPoint:location fromView:self.view.window] withEvent:nil]) 
        {
           // Remove the recognizer first so it's view.window is valid.
          [self.view.window removeGestureRecognizer:sender];
          [self dismissModalViewControllerAnimated:YES];
        }
     }
}

这就是它。 HIG被诅咒，这是一种有用且常常是直观的行为。

That's about it. HIG be damned, this is a useful and often intuitive behavior.

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