我正在iPhone应用程序中实现拖放系统。到目前为止，我设法实现了可拖动按钮并且工作正常。这是我的代码:首先，我将操作分配给按钮:[buttonaddTarget:selfaction:@selector(imageMoved:withEvent:)forControlEvents:UIControlEventTouchDragInside];然后，我创建拖动:-(IBAction)imageMoved:(id)senderwithEvent:(UIEvent*)event{NSLog(@"moved");CGPointpoint=[[[eventallTouches]anyObjec