Question

我需要使用触摸事件，但我试图从另一个类中检测到它，所以如果触摸或移动等我将回到我的主类。我在＆＃34; classTouchEvents＆＃34;中调用init方法。首先来自我的主要课程

objectTouchEvents=[[classTouchEvents alloc]initWith:self.view];

这是＆＃34; classTouchEvents＆＃34;

的initWith方法

 - (id)initWith:(UIView *)selfView
{
    self = [super init];
    if (self) {
        NSLog(@"here");
        view=[[UIView alloc]init];
        view=selfView;
        // Custom initialization
    }
    return self;
}

我得到＆＃34;在这里＆＃34;记录所以我猜它有效，但我无法检测视图是否触摸或任何东西。这是我在classTouchEvents中的触摸事件

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{

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

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

但我无法获得有关触摸的任何日志。我需要一些帮助。提前谢谢。

Answer 1

我会使用委托：

TouchDelegate.h：

#import <UIKit/UIKit.h>

@protocol TouchDelegate <NSObject>
@optional

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event;
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event;
-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event;

@end

然后在您的视图中（实际上会收到触摸事件），创建一个touchDelegate属性（如果不可能有其他属性，则创建delegate）：

#import "TouchDelegate.h"

@interface MyView : UIView
@property (weak, nonatomic) id<TouchDelegate> touchDelegate;
...
@end

然后照常委托：

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    if ([_touchDelegate respondsToSelector:@selector(touchesBegan:withEvent:)]) {
        [_touchDelegate touchesBegain:touches withEvent:event];
    }
}

// etc.

Answer 2

我将使用委托实现UIView的自定义子类。

@protocol TouchEventsDelegate <NSObject>

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event inView:(UIView *)view;
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event inView:(UIView *)view;
-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event inView:(UIView *)view;

@end

@property (weak, nonatomic) id<TouchEventsDelegate> delegate;

在ClassTouchEvents中实现这些委托方法。

在自定义视图中实施触摸事件方法并调用委托。

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    if (self.delegate && [self.delegate respondsToSelector:@selector(touchesBegan:withEventinView)]) {
        [self.delegate touchesBegan:touches withEvent:event inView:self];
    }
}

如何检测touchesBegan，touchesMoved，touchesEnded来自另一个类的事件

2 个答案: