Ipad 仅在iOS 8上的Modal UIViewController内检测到UIAPTgestureRecognitor

我一直在尝试实现一个UITapGestureRecognitor，它通过检测iOS 8上模式视图控制器外部的点击来关闭模式视图控制器

我看到的问题是，在iPad的横向模式下，点击手势只能在视图控制器的内部识别。我的模态视图是380宽x 550高。当方向处于横向（主页按钮位于右侧）时，会在模式视图的下半部分内检测到点击手势。当方向为横向，但主页按钮位于左侧时，会在模式视图的上半部分内检测到点击手势

问题1：点击手势仅在模态视图内部检测到，而应在外部检测到。 问题2：在横向视图的某些区域中未检测到

以下是我使用的代码：

UIViewController+DismissOntaOutside.h

#import <UIKit/UIKit.h>

@interface UIViewController (DismissOnTapOutside)

- (void)registerForDismissOnTapOutside; // Call in viewDidAppear
- (void)unregisterForDismissOnTapOutside; // Call in viewWillDisappear

@end

我在StackOverflow上看到的与此问题相关的所有示例都坚信上述代码是有效的。但在我的例子中，它根本没有检测到模态视图控制器外部的点击

在iPad的iOS 8中，如何在横向方向上检测到模式外的点击

#import "UIViewController+DismissOnTapOutside.h"
#import <objc/runtime.h>

static char gestureRecognizerKey;
static char gestureRecognizerDelegateKey;

@interface SimpleGestureRecognizerDelegate : NSObject <UIGestureRecognizerDelegate>

@end

@implementation SimpleGestureRecognizerDelegate

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
    return YES;
}

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRequireFailureOfGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{

    return [otherGestureRecognizer isMemberOfClass:[UITapGestureRecognizer class]];
}

@end

@interface UIViewController ()

@property (assign, nonatomic) UIGestureRecognizer *gestureRecognizer;
@property (strong, nonatomic) SimpleGestureRecognizerDelegate *gestureRecognizerDelegate;

@end

@implementation UIViewController (DismissOnTapOutside)

- (void)setGestureRecognizer:(UIGestureRecognizer *)gestureRecognizer
{
    objc_setAssociatedObject(self, &gestureRecognizerKey, gestureRecognizer, OBJC_ASSOCIATION_ASSIGN);
}

- (UIGestureRecognizer *)gestureRecognizer
{
    return objc_getAssociatedObject(self, &gestureRecognizerKey);
}

- (void)setGestureRecognizerDelegate:(SimpleGestureRecognizerDelegate *)delegate
{
    objc_setAssociatedObject(self, &gestureRecognizerDelegateKey, delegate, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}

- (UIGestureRecognizer *)gestureRecognizerDelegate
{
    id delegate = objc_getAssociatedObject(self, &gestureRecognizerDelegateKey);
    if (!delegate)
    {
        delegate = [[SimpleGestureRecognizerDelegate alloc] init];
        self.gestureRecognizerDelegate = delegate;
    }

    return delegate;
}

- (void)handleDismissTap:(UIGestureRecognizer *)gesture
{
    if (gesture.state == UIGestureRecognizerStateEnded)
    {
        UIView *view = self.navigationController.view ?: self.view;
        // Passing nil gives us coordinates in the window
        CGPoint location = [gesture locationInView:nil];

        if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"8.0")) {
            if (UIInterfaceOrientationIsLandscape([UIApplication sharedApplication].statusBarOrientation)) {
                location = CGPointMake(location.y, location.x);
            }
        }

        // Then we convert the tap's location into the local view's coordinate system
        location = [view convertPoint:location fromView:self.view.window];

        if (![view pointInside:location withEvent:nil])
        {
            [self.presentingViewController dismissViewControllerAnimated:YES completion:nil];
        }
    }
}

- (void)registerForDismissOnTapOutside
{
    // This approach is attributed to Danilo Campos:
    // http://stackoverflow.com/a/6180584/456434
    UITapGestureRecognizer *recognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleDismissTap:)];
    recognizer.delegate = self.gestureRecognizerDelegate;
    recognizer.numberOfTapsRequired = 1;
    recognizer.cancelsTouchesInView = NO;

    self.gestureRecognizer = recognizer;
    [self.view.window addGestureRecognizer:recognizer];
}

- (void)unregisterForDismissOnTapOutside
{
    [self.view.window removeGestureRecognizer:self.gestureRecognizer];
    self.gestureRecognizer = nil;
}

@end

- (void)handleDismissTap:(UIGestureRecognizer *)gesture
{
    if (gesture.state == UIGestureRecognizerStateEnded)
    {
        UIView *view = self.navigationController.view ?: self.view;
        // Passing nil gives us coordinates in the window
        CGPoint location = [gesture locationInView:nil];

        if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"8.0")) {
            if (UIInterfaceOrientationIsLandscape([UIApplication sharedApplication].statusBarOrientation)) {
                location = CGPointMake(location.y, location.x);
            }
        }

        // Then we convert the tap's location into the local view's coordinate system
        location = [view convertPoint:location fromView:self.view.window];

        if (![view pointInside:location withEvent:nil])
        {
            [self.presentingViewController dismissViewControllerAnimated:YES completion:nil];
        }
    }
}