iOS 拖拽View跟随手指浮动 iOS

【iOS 拖拽View跟随手指浮动】效果图：

文章图片

1.自定义要跟随手指浮动的那个View

// //OrangeView.m //拖拽View跟随手指浮动 // //Created by llkj on 2017/8/16. //Copyright ? 2017年 LayneCheung. All rights reserved. //#import "OrangeView.h"@implementation OrangeView//当开始触摸屏幕的时候调用 - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{NSLog(@"%s", __func__); }//触摸时开始移动时调用(移动时会持续调用) //NSSet:无序 //NSArray:有序 - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{NSLog(@"%s", __func__); UITouch *touch = [touches anyObject]; //求偏移量 = 手指当前点的X - 手指上一个点的X CGPoint currentPoint = [touch locationInView:self]; CGPoint prePoint = [touch previousLocationInView:self]; NSLog(@"ccurrentPoint = %@", NSStringFromCGPoint(currentPoint)); NSLog(@"prePiont = %@", NSStringFromCGPoint(prePoint)); CGFloat offSetX = currentPoint.x - prePoint.x; CGFloat offSetY = currentPoint.y - prePoint.y; //平移 self.transform = CGAffineTransformTranslate(self.transform, offSetX, offSetY); }//当手指离开屏幕时调用 -(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{NSLog(@"%s", __func__); }//当发生系统事件时就会调用该方法(电话打入,自动关机) - (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event{NSLog(@"%s", __func__); } @end

2.创建自定义的View 在storyboard中拖一个View绑定他的类为OrangeView；
或者代码创建手动添加到控制器的View上去；