Question

我尝试在mapview上检测事件。我只需要检测缩放（双击或两个手指在屏幕上）。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，我会失去地图上的控件（How to intercept touches events on a MKMapView or UIWebView objects?）

感谢您的帮助！

贝

Answer 1

向我们展示一些代码。您应该能够将您不感兴趣的任何事件传递回父视图。例如，在您检测到两个手指点击并执行任何操作后，将同一事件传递回mapview并让其自行缩放。

完成事件检测后，您就会调用以下内容：

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

Answer 2

据此：link text

Mkmapview必须是事件的默认接收者。

所以我将主窗口的类更改为MyMainWindow：

<强> MyMainWindow.h

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

@interface MyMainWindow : UIWindow {    

TouchListener *Touch;

}

@end

<强> MyMainWindow.m

 #import "MyMainWindow.h"

 @implementation MyMainWindow

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

<强> TouchListener.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

<强> 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

我错过了什么吗？

感谢您的帮助

在mapView MapKit上的屏幕上检测2个手指

2 个答案: