MBProgressHUD长时间加载无法取消的解决方法

使用MBProgressHUD时，加载网路数据，或者等待webview加载完毕，长时间的等待导致体验不佳，这时候希望点击屏幕取消加载动画效果；

//  MBProgressHUD.h

@protocol MBProgressHUDDelegate <NSObject>

@optional

/**
 * Called after the HUD was fully hidden from the screen.
 */
- (void)hudWasHidden:(MBProgressHUD *)hud;

-(void)hudViewTapGesture;

@end

//  MBProgressHUD.m

-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
    if ([self.delegate respondsToSelector:@selector(hudViewTapGesture)]) {
        [self.delegate performSelector:@selector(hudViewTapGesture)];
    }
}

//viewcontroller.m

-(void)hudViewWasTapped {
    [HUD hide:YES];
}