移动到新的位置

DragView.m

#import <UIKit/UIKit.h>

@interface DragView : UIImageView
{
	CGPoint startLocation;
}
@end

@implementation DragView

- (void) touchesBegan:(NSSet*)touches withEvent:(UIEvent*)event
{
	// Retrieve the touch point
	CGPoint pt = [[touches anyObject] locationInView:self];
	startLocation = pt;
	[[self superview] bringSubviewToFront:self];
}

- (void) touchesMoved:(NSSet*)touches withEvent:(UIEvent*)event
{
	// Move relative to the original touch point
	CGPoint pt = [[touches anyObject] locationInView:self];
	CGRect frame = [self frame];
	frame.origin.x += pt.x - startLocation.x;
	frame.origin.y += pt.y - startLocation.y;
	[self setFrame:frame];
}

写的不错哦 我也是刚学这个 不太明白 bringSubviewToFront的意思