scrollview 及其子檢視無法響應touch事件

辦法一：給view新增點選事件

    - (void)viewDidLoad  
    {  
        [super viewDidLoad];  
        UITapGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(keyboardHide:)];  
        //設定成NO表示當前控制元件響應後會傳播到其他控制元件上，預設為YES。  
        tapGestureRecognizer.cancelsTouchesInView = NO;  
        //將觸控事件新增到當前view  
        [self.view addGestureRecognizer:tapGestureRecognizer];  
    }  
      
    -(void)keyboardHide:(UITapGestureRecognizer*)tap{  
        [textFiled resignFirstResponder];  
    }  
 

辦法二：建立scrollview的分類，重寫touch方法

@implementation UIScrollView (Touch)

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
	NSLog(@"touch begin");
	if(!self.dragging)
	{
		[[self nextResponder] touchesBegan:touches withEvent:event];
	}
	[super touchesBegan:touches withEvent:event];
}
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
	if(!self.dragging)
	{
		[[self nextResponder] touchesMoved:touches withEvent:event];
	}
	[super touchesMoved:touches withEvent:event];
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
	if(!self.dragging)
	{
		[[self nextResponder] touchesEnded:touches withEvent:event];
	}
	[super touchesEnded:touches withEvent:event];
}

@end