UIScrollView touch

UIScrollView本身无法处理touch事件
要想实现，必须对UIScrollView上的subView做touch处理
原理十分简单，好比要响应scrollView上的UIImageView，那么请创建一个UIImageVIew的子类，由这个自定义的UIImageView来处理touch事件
头文件声明如下，供参考：
#import <Foundation/Foundation.h>

@protocol ImageTouchDelegate
-(void)imageTouch:(NSSet *)touches withEvent:(UIEvent *)event whichView:(id)imageView;
@end

@interface ImageTouchView : UIImageView 
{
        id<ImageTouchDelegate>  delegate;
        BOOL delegatrue;
}
@property(nonatomic,assign)id<ImageTouchDelegate> delegate;

@end
这个是头文件，源文件可以是这个这样子

@implementation ImageTouchView
@synthesize     delegate;

-(id)initWithFrame:(CGRect)frame
{
        if (self == [super initWithFrame:frame]) 
        {
                [self setUserInteractionEnabled:YES];
                delegatrue=YES;
        }
        return  self;
}
- (BOOL)touchesShouldBegin:(NSSet *)touches withEvent:(UIEvent *)event inContentView:(UIView *)view
{
        return YES;
}


-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
        if (delegatrue)
        {
                [delegate imageTouch:touches withEvent:event whichView:self];
        }