iphone - 在 mapView MapKit 上检测屏幕上的 2 个手指

Question

我尝试在地图视图上检测事件。我只需要检测缩放（在屏幕上双击或两根手指）。我尝试添加一个检测事件的 UIview 图层，但是如果我添加一个图层，我会失去对地图的控制（如何拦截 MKMapView 或 UIWebView 对象上的触摸事件？）

感谢帮助！

托尼

Answer 1

给我们看一些代码。您应该能够将您不感兴趣的任何事件传递回父视图。例如，在您检测到两根手指敲击并做任何您想做的事情后，将相同的事件传递回 mapview 并让它自行缩放。

这是您在完成事件检测后调用的内容：

[self.nextResponder touchesBegan:touches withEvent:event];

Answer 2

据此：链接文本

Mkmapview 必须是事件的默认接收器。

所以我将主窗口的类更改为 MyMainWindow：

我的主窗口.h

#import <Foundation/Foundation.h>
@class TouchListener;

@interface MyMainWindow : UIWindow {    

TouchListener *Touch;

}

@end 

我的主窗口.m

 #import "MyMainWindow.h"

 @implementation MyMainWindow

 - (void)sendEvent:(UIEvent*)event {  
 [super sendEvent:event];  
 [Touch sendEvent:event];
 }
 @end

触摸监听器.h

#import <Foundation/Foundation.h>
@interface TouchListener : UIView {

}

- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event;
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event;
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event;
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event;
- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event;

@end

TouchListeners.m

#import "TouchListener.h"

@implementation TouchListener

- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event {
 return self;
}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
 NSLog(@"Moved");
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    NSLog(@"Touch Began");
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
    NSLog(@"Touch Ended");
}

- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event {
    NSLog(@"Touch Cancel");
}

@end

我错过了什么？

感谢帮助