抽屉

第一步:
在AppDelegate.m里
首先导入头文件 #import “ViewController.h”

ViewController *vc = [[ViewController alloc]init];
    
    vc.title = @"抽屉";
    
    UINavigationController *nav = [[UINavigationController alloc]initWithRootViewController:vc];
    
    self.window.rootViewController = nav;

第二步:
在ViewController.m

// 左视图
@property (nonatomic,strong) UIView *leftView;

viewDidLoad 里

 // A 视图   本身view的背景颜色
    self.view.backgroundColor = [UIColor redColor];
    
    // B 视图   根视图背景颜色
    [UIApplication sharedApplication].keyWindow.backgroundColor = [UIColor cyanColor];
    
    // 设置左视图是否可以与用户交互
    self.leftView.userInteractionEnabled = YES;
    
    self.leftView.frame = CGRectMake(-80, 64, self.view.frame.size.width, self.view.frame.size.height - 64);
    
//    [self.navigationController.view.superview addSubview:self.leftView];
//    
//    [self.navigationController.view.superview sendSubviewToBack:self.leftView];
//    
    //设置左视图的大小
//    self.leftView.frame = self.view.frame;
    
    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(left)];
    
}

-(void)left{
    
    // 点击导航按钮 设置页面相对于原来位置变换的位置
    
    //CGAffineTransformMakeTranslation; //相对于屏幕平移的距离
    // CGAffineTransformMakeScale; //平移后相对于原来的大小 这个是按比例计算的
    [UIView animateWithDuration:0.25 animations:^{
        
        self.navigationController.view.transform = CGAffineTransformConcat(CGAffineTransformMakeTranslation(380, 0), CGAffineTransformMakeScale(0.7, 1.0));
    }];
    
}

-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
    
    //切换动画
    [UIView animateWithDuration:0.25 animations:^{
        self.navigationController.view.transform = CGAffineTransformIdentity;
        
        self.leftView.transform = CGAffineTransformIdentity;
        
    }];
    [super touchesBegan:touches withEvent:event];
    
    
}

运行效果: