iOS实现拖拽View跟随手指浮动效果

这篇文章主要为大家详细介绍了iOS实现拖拽View跟随手指浮动，文中示例代码介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们可以参考一下

本文实例为大家分享了ios实现拖拽view跟随手指浮动的具体代码，供大家参考，具体内容如下

效果图：

iOS实现拖拽View跟随手指浮动效果

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<uitouch *> *)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<uitouch *> *)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<uitouch *> *)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<uitouch *> *)touches withevent:(uievent *)event{

									 nslog(@"%s", __func__);

									}

									@end