抽屉的主要原理为有两个view的frame改变从而显示出抽屉效果
我简单的封装了一个抽屉小框架，希望能对大家有写帮助
-WQDrawerController.h
// // WQDrawerController.h // WQDrawer // // Created by li on 16/11/26. // Copyright © 2016年 李文强. All rights reserved. // #import <UIKit/UIKit.h> @interface WQDrawerController : UIViewController //向外界提供接口，便于外界访问 -(void)mainVC:(UIViewController*)mainVC leftVc:(UIViewController*)leftVc; @end-WQDrawerController.m
// // WQDrawerController.m // WQDrawer // // Created by li on 16/11/26. // Copyright © 2016年 李文强. All rights reserved. // #import "WQDrawerController.h" @interface WQDrawerController () @property(strong,nonatomic)UIViewController*mainVc; @property(strong,nonatomic)UIViewController*leftVc; @property(strong,nonatomic)UIButton*coverbtn; @end @implementation WQDrawerController - (void)viewDidLoad { [super viewDidLoad]; self.view.backgroundColor=[UIColor redColor]; [self addGesture]; } //设置主控制器和左边控制器 -(void)mainVC:(UIViewController *)mainVC leftVc:(UIViewController *)leftVc{ self.leftVc=leftVc; [self addChildViewController:self.leftVc]; self.leftVc.view.frame=self.view.frame; [self.view addSubview:self.leftVc.view]; self.mainVc=mainVC; [self addChildViewController:self.mainVc]; self.mainVc.view.frame=self.view.frame; [self.view addSubview:self.mainVc.view]; } //打开抽屉 -(void)openDrawer{ [UIView animateWithDuration:0.25 animations:^{ self.mainVc.view.frame=CGRectMake([UIScreen mainScreen].bounds.size.width*0.75, 0, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height); }]; [self addcover]; } //关闭抽屉 -(void)closeDrawer{ [UIView animateWithDuration:0.25 animations:^{ self.mainVc.view.frame=CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height); }]; [self.coverbtn removeFromSuperview]; self.coverbtn=nil; } //添加手势 -(void)addGesture{ UIPanGestureRecognizer*pan=[[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(GestureEvent:)]; [self.view addGestureRecognizer:pan]; } //手势的响应事件 -(void)GestureEvent:(UIPanGestureRecognizer*)pan{ if (pan.state==UIGestureRecognizerStateEnded||pan.state==UIGestureRecognizerStateCancelled) { if (self.mainVc.view.frame.origin.x>=[UIScreen mainScreen].bounds.size.width*0.5) { [self openDrawer]; }else{ [self closeDrawer]; } }else if(pan.state==UIGestureRecognizerStateChanged){ CGFloat offset=[pan translationInView:pan.view].x; if (offset>0) { self.mainVc.view.frame=CGRectMake(offset, 0, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height); } } } //添加遮盖 -(void)addcover{ self.coverbtn=[[UIButton alloc]init]; [self.coverbtn addTarget:self action:@selector(closeDrawer) forControlEvents:UIControlEventTouchDown]; self.coverbtn.frame=self.mainVc.view.bounds; [self.mainVc.view addSubview:self.coverbtn]; } @end注：在iOS中如果两个View为父子控件，那么这两个view所在的controller也必须为父子控制器
