图层的位置交换

view老版本视图的分解

view也可以进行增删改差

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    UIView *view = [[UIView alloc]initWithFrame:CGRectMake(100, 100, 414-100-10, 50)];
    view.backgroundColor = [UIColor redColor];
    //视图添加方法
    [self.view addSubview:view];
    UIView *view2 = [[UIView alloc]initWithFrame:CGRectMake(100, 200, 414-100-10, 50)];
    view2.backgroundColor = [UIColor greenColor];
    [self.view addSubview:view2];
}
@end

//xr 414*896

view重合

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    UIView *view = [[UIView alloc]initWithFrame:CGRectMake(100, 100, 414-100-10, 50)];
    view.backgroundColor = [UIColor redColor];
    //视图添加方法
    [self.view addSubview:view];
    UIView *view2 = [[UIView alloc]initWithFrame:CGRectMake(100, 100, 414-100-10, 50)];
    view2.backgroundColor = [UIColor greenColor];
    [self.view addSubview:view2];
}
@end

交换视图

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    UIView *view = [[UIView alloc]initWithFrame:CGRectMake(100, 100, 414-100-10, 50)];
    view.backgroundColor = [UIColor redColor];
    //视图添加方法
    [self.view addSubview:view];
    UIView *view2 = [[UIView alloc]initWithFrame:CGRectMake(100, 100, 414-100-10, 50)];
    view2.backgroundColor = [UIColor greenColor];
    [self.view addSubview:view2];
    //exchangeSubviewAtIndex 新版本的xcode传入0，1；老版本传入2，3
    [self.view exchangeSubviewAtIndex:1 withSubviewAtIndex:0];
    //等价于[self.view exchangeSubviewAtIndex:0 withSubviewAtIndex:1];
}
@end

//xr 414*896

把某个视图插入到某个位置

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    UIView *view = [[UIView alloc]initWithFrame:CGRectMake(100, 100, 414-100-10, 50)];
    view.backgroundColor = [UIColor redColor];
    //视图添加方法
    [self.view addSubview:view]; //index 0
    UIView *view2 = [[UIView alloc]initWithFrame:CGRectMake(100, 100, 414-100-10, 50)];
    view2.backgroundColor = [UIColor greenColor];
    //把某个视图插入到某个位置
    [self.view insertSubview:view2 atIndex:0];// index 0 红色， index 1 绿色
}
@end

//xr 414*896

把某个视图移到最前面

先创建3个视图

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    UIView *view = [[UIView alloc]initWithFrame:CGRectMake(100, 100, 414-100-10, 50)];
    view.backgroundColor = [UIColor redColor];
    //视图添加方法
    [self.view addSubview:view]; //index 0 红色
    UIView *view2 = [[UIView alloc]initWithFrame:CGRectMake(110, 110, 414-100-10, 50)];
    view2.backgroundColor = [UIColor greenColor];
    //把某个视图插入到某个位置
    [self.view addSubview:view2];// index 1 绿色
    UIView *view3 = [[UIView alloc]initWithFrame:CGRectMake(120, 120, 414-100-10, 50)];
    view3.backgroundColor = [UIColor blueColor];
}
@end

//xr 414*896

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    UIView *view = [[UIView alloc]initWithFrame:CGRectMake(100, 100, 414-100-10, 50)];
    view.backgroundColor = [UIColor redColor];
    //视图添加方法
    [self.view addSubview:view]; //index 0 红色
    UIView *view2 = [[UIView alloc]initWithFrame:CGRectMake(110, 110, 414-100-10, 50)];
    view2.backgroundColor = [UIColor greenColor];
    //把某个视图插入到某个位置
    [self.view addSubview:view2];// index 1 绿色
    UIView *view3 = [[UIView alloc]initWithFrame:CGRectMake(120, 120, 414-100-10, 50)];
    view3.backgroundColor = [UIColor blueColor];
    //把某个视图插入到某个位置
    [self.view addSubview:view3];//index 2 蓝色
    [self.view bringSubviewToFront:view];//把红色的视图移到最前面
}
@end

//xr 414*896

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    UIView *view = [[UIView alloc]initWithFrame:CGRectMake(100, 100, 414-100-10, 50)];
    view.backgroundColor = [UIColor redColor];
    //视图添加方法
    [self.view addSubview:view]; //index 0 红色
    UIView *view2 = [[UIView alloc]initWithFrame:CGRectMake(110, 110, 414-100-10, 50)];
    view2.backgroundColor = [UIColor greenColor];
    //把某个视图插入到某个位置
    [self.view addSubview:view2];// index 1 绿色
    UIView *view3 = [[UIView alloc]initWithFrame:CGRectMake(120, 120, 414-100-10, 50)];
    view3.backgroundColor = [UIColor blueColor];
    //把某个视图插入到某个位置
    [self.view addSubview:view3];//index 2 蓝色
    //bringSubviewToFront 吧某个view移动到最前面
    [self.view bringSubviewToFront:view];//把红色的视图移到最前面
    //sendSubviewToBack 吧某个view发送到最下方
    [self.view sendSubviewToBack:view3];
}
@end

//xr 414*896