进击的UI-----------------自定义视图&检测屏幕旋转&处理内存警告

 

1.自定义视图

流程:

1⃣️ 新建一个类 继承于UIView

2⃣️ 将控件写成view的属性

3⃣️ .m初始化

4⃣️ 直接在类外引入头文件 调用

5⃣️ 注意: 建议不要把控件的初始化写在系统的初始化方法里直接用self调方法 自己封装方法

2.视图控制器指定自定义View

新建ViewController就是MVC(Mode(模型) View(视图) Controller(模型和视图两者的联系))设计模式的体现

3.检测屏幕旋转

1⃣️:ViewController.m

- (NSUInteger)supportedInterfaceOrientations

{

    // portrait 竖着

    // portraitupsidedown上下颠倒竖着

    // landscape left 横着 左

    // landscape right 横着 右

    return  UIInterfaceOrientationMaskAll;

}

- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration{

    NSLog(@"将要旋转");

}

- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation{

    NSLog(@"已经完成旋转");

}

- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view.

}

2⃣️:View.m

- (instancetype)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        [self p_setupView];
    }
    return self;
}
- (void)p_setupView{
    self.backgroundColor = [UIColor blackColor];
    self.nameLabel =  [[UILabel alloc]initWithFrame:CGRectMake(10, 100, 200, 300)];
    //  [[UIScreen mainScreen]bounds].size.width

    _nameLabel.backgroundColor = [UIColor yellowColor]; 

    [self addSubview:_nameLabel];}

// 当bounds改变时,需要重写layoutSubview的方法

- (void)layoutSubviews{

    if ([UIApplication sharedApplication].statusBarOrientation ==UIInterfaceOrientationMaskPortrait || [UIApplication sharedApplication].statusBarOrientation == UIInterfaceOrientationPortraitUpsideDown) {

        _nameLabel.frame = CGRectMake(10, 100, 355, 200);

    }else{

        _nameLabel.frame = CGRectMake(50, 50, 300, 100);

    }

}

4.处理内存警告

ViewController.m

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    //处理内存警告的方法

    if ([self isViewLoaded] == YES && self.view.window == nil) {

        self.view = nil;

    }

}

5.容器视图控制器

ViewController.m

#import "RootViewController.h"

#import "RedViewController.h"

#import "BlueViewController.h"

@interface RootViewController ()

@property (nonatomic,retain)RedViewController *RedVC;

@property (nonatomic,retain)BlueViewController *BlueVC;

@end

@implementation RootViewController

- (void)viewWillAppear:(BOOL)animated{

    NSLog(@"将要出现");

}

- (void)viewDidAppear:(BOOL)animated{

    NSLog(@"已经出现");

}

- (void)viewWillDisappear:(BOOL)animated{

    NSLog(@"将要消失");

}

- (void)viewDidDisappear:(BOOL)animated{

    NSLog(@"已经消失");

}

- (void)viewDidLoad {

    [super viewDidLoad];

    NSLog(@"已经加载了");

    _BlueVC = [[BlueViewController alloc]init];

    _RedVC = [[RedViewController alloc]init];

    [self addChildViewController:_BlueVC];

    [self addChildViewController:_RedVC];

    [self.view addSubview:_RedVC.view];

    [self.view addSubview:_BlueVC.view];

    UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];

    button.frame = CGRectMake(100, 100, 100, 100);

    button.backgroundColor = [UIColor purpleColor];

    [button addTarget:self action:@selector(buttonAction) forControlEvents:UIControlEventTouchUpInside];

    [self.BlueVC.view addSubview:button];

}

- (void)buttonAction{

    [self transitionFromViewController:self.BlueVC toViewController:self.RedVC duration:20 options:UIViewAnimationOptionTransitionFlipFromBottom animations:^{

       

    } completion:^(BOOL finished) {

       

    }];}

重点:

1⃣️:AppDelegate.m

#import "AppDelegate.h"
#import "ZCHViewController.h"

@interface AppDelegate ()

@end

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    self.window = [[UIWindow alloc]initWithFrame:[[UIScreen mainScreen]bounds]];
    self.window.backgroundColor = [UIColor whiteColor];
    [self.window makeKeyAndVisible];
    ZCHViewController *zchVC = [[ZCHViewController alloc]init];
    self.window.rootViewController = zchVC;
    return YES;

}

2⃣️:ZCHViewController.m

#import "ZCHViewController.h"
#import "MyView.h"
@interface ZCHViewController ()
@property (nonatomic,retain)MyView *mv;

@end

@implementation ZCHViewController
// 必须把Controller 自带的view给替换掉
// 自己写的view,需要在Controller.m里区重写加载视图的方法(loadView)
// 加载视图
- (void)loadView{
    self.mv = [[MyView alloc]initWithFrame:[[UIScreen alloc]bounds]];
    self.view = _mv;
                

}

- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor yellowColor];

}

3⃣️:MyView.h

#import <UIKit/UIKit.h>
@interface MyView : UIView
@property (nonatomic,retain)UILabel *nameLabel;

@end

4⃣️:MyView.m

#import "MyView.h"
@implementation MyView
- (instancetype)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        [self z_setupView];
    }
    return self;
}
- (void)z_setupView{
     _nameLabel = [[UILabel alloc]initWithFrame:CGRectMake(100, 100, 100, 40)];
        _nameLabel.backgroundColor = [UIColor grayColor];
    [self addSubview:_nameLabel];
}

@end