手势相关操作

新建各种手势:
Tap:
recognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTapFrom:)];
Swipe:
recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeFrom:)];
------------    ----------------- ----------------     ------------------
复用函数:
- (void)showImageWithText:(NSString *)string atPoint:(CGPoint)centerPoint 
{
	
    /*
     Set the appropriate image for the image view, move the image view to the given point, then dispay it by setting its alpha to 1.0.
     */
    
    //获取到的图片,显示alpha=1.0.出现在屏幕上
	NSString *imageName = [string stringByAppendingString:@".png"];
	imageView.image = [UIImage imageNamed:imageName];
	imageView.center = centerPoint;
	imageView.alpha = 1.0;	
}
这是个可以多次调用的函数,在方法调用的时候,提供图片的名字,(不要后缀),这个函数对后缀自动添加,可以匹配不同的图片.
比如:
设计到不同图片的操作显示.
swipe/tap操作后,显示不同的图片,
[self showImageWithText:@"tap" atPoint:location];
[self showImageWithText:@"swipe" atPoint:location];
//[recognizer rotation] 是获取旋转角度值
    CGAffineTransform transform = CGAffineTransformMakeRotation([recognizer rotation]);
    //付给可以动画的transform属性
    imageView.transform = transform;
    //没明白这个啥意思?
    [segmentedControl setExclusiveTouch: YES];