UI 第三课 ⼀、自定义视图 二、视图控制器指定⾃自定义View 三、检测屏幕旋转 四、处理内存警告 五、容器视图控制器

⼀、自定义视图

二、视图控制器指定⾃自定义View

三、检测屏幕旋转

四、处理内存警告

五、容器视图控制器

//新建一个类继承UIView

#import<UIKit/UIKit.h>

@interfaceMyView : UIView
// 把两个小view声明成属性
// 是为了 方便外面调用

@property(nonatomic,retain) UIView *v1;
@property(nonatomic,retain) UIView *v2;

@end

=============================

// 类中重写初始化方法

- (instancetype)initWithFrame:(CGRect)frame{
    self = [superinitWithFrame:frame];
    if (self) {
        _v1 = [[UIViewalloc]initWithFrame:CGRectMake(0,0,70,50)];
        _v1.backgroundColor= [UIColoryellowColor];
        [selfaddSubview:_v1];
        [_v1release];
       
        _v2 = [[UIViewalloc]initWithFrame:CGRectMake(70+ 30,0,200,50)];
        _v2.backgroundColor= [UIColorblueColor];
        [selfaddSubview:_v2];
        [_v2release];
    }
    return self;

}

==============================================

// 在AppDelegate.m中

- (BOOL)application:(UIApplication*)application didFinishLaunchingWithOptions:(NSDictionary*)launchOptions {
    self.window= [[UIWindowalloc]initWithFrame:[[UIScreenmainScreen]bounds]];
    // Override point for customization after application launch.
    self.window.backgroundColor= [UIColorwhiteColor];
    //循环创建3个UIView
    for (inti = 0; i <3; i++) {
        //这就是一个自定义的视图
        //虽然什么都没写
        MyView *myView = [[MyViewalloc]initWithFrame:CGRectMake(([UIScreenmainScreen].bounds.size.width- 300) /2,100 + 80*i,300,50)];
        myView.backgroundColor= [UIColorredColor];
        [self.windowaddSubview:myView];
        [myView release];
        myView.v1.backgroundColor= [UIColorblackColor];
        myView.v2.backgroundColor= [UIColorblackColor];
    }
    [self.windowmakeKeyAndVisible];
    return YES;

}

二、视图控制器指定⾃自定义View

//加载视图加载self.view
//用加载视图的方法来实现自定义视图
//- (void)loadView{
//  // [super loadView];
//    //创建一个view给视图控制器self.view
//   
//     MyView *myview = [[MyView alloc] initWithFrame:[[UIScreen mainScreen]bounds]];
//    self.view = myview;//给视图控制器的属性 view赋值
//    //[self.view addSubview:myview];//self.view是nil myview加载不上;
//}


//视图的控制器的生命周期
- (void)viewDidAppear:(BOOL)animated{
    NSLog(@"显示完成");
}
- (void)viewDidDisappear:(BOOL)animated{
    NSLog(@"已经消失");
}
- (void)viewWillAppear:(BOOL)animated{
    NSLog(@"视图将要出现");
}
- (void)viewWillDisappear:(BOOL)animated{
    NSLog(@"将要消失");
   
}
//重写初始化方法
- (instancetype)init{
    self = [superinit];
    if (self) {
       
    }
    returnself;
}

//这里他加载的视图是

- (void)viewDidLoad {
    [superviewDidLoad];
    // Do any additional setup after loading the view.
    self.view.backgroundColor = [UIColorredColor];
    UIView *view1 = [[UIViewalloc]initWithFrame:CGRectMake(100,100,100,100)];
//    view1.backgroundColor = [UIColor greenColor];
    [self.viewaddSubview:view1];
    MyView *myview = [[MyViewalloc]initWithFrame:[[UIScreenmainScreen]bounds]];
    myview.backgroundColor = [UIColoryellowColor];
    myview.text.delegate =self;
    [self.viewaddSubview:myview];
    Person *per = [Personnew];
    per.name =@"王";
    per.age =@"nan";
    myview.label.text = per.name;
    myview.text.placeholder = per.age;
    [myview.btnaddTarget:selfaction:@selector(buttonClick:)forControlEvents:(UIControlEventTouchUpInside)];
    [myview release];
[per release];
   
   
   
   
}

- (void)didReceiveMemoryWarning {
      NSLog(@"内存警告了");
    [superdidReceiveMemoryWarning];
    //我们需要把不用的视图移除
    //1.这个视图必须被加载过
    //2.不能是当前显示窗口
    // Dispose of any resources that can be recreated.
    if ([selfisViewLoaded] ==YES&& !self.view.window) {
        self.view =nil;
    }else{
        NSLog(@"这个视图可能没被加载过 ,或者,是当前显示的窗口");
    }
   
   
}


//屏幕旋转
//1. 允许屏幕旋转
 //2 设置旋转方向
//3.检测屏幕旋转
- (BOOL)shouldAutorotate{
    returnYES;
}
//设置全都能转
- (NSUInteger)supportedInterfaceOrientations{
    returnUIInterfaceOrientationMaskAll;
   
}
//检测屏幕旋转
- (void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator{
    NSLog(@"%@",NSStringFromCGSize(size));
}
- (void)buttonClick:(UIButton *)button{
//    MyView*myview1 =(MyView *) button.superview;
//    //更改bounds
//    myview1.bounds = CGRectMake(100,100 , 100, 100);
    ThreeViewController *threeVC = [[ThreeViewControlleralloc]init];
    // 跳转方法
    [selfpresentViewController:threeVCanimated:NOcompletion:nil];
   
   

}

===========================================

#import"ThreeViewController.h"

@interfaceThreeViewController ()

@end

@implementation ThreeViewController
//  视图加载完成
- (void)viewDidLoad {
    [superviewDidLoad];
    // Do any additional setup after loading the view.
    self.view.backgroundColor = [UIColorgreenColor];
   
    UIButton *button = [UIButtonbuttonWithType:(UIButtonTypeCustom)];
    button.frame =CGRectMake(100,100,100,100);
    button.backgroundColor = [UIColororangeColor];
    [button addTarget:selfaction:@selector(buttonClick:)forControlEvents:(UIControlEventTouchUpInside)];
    [self.viewaddSubview:button];
   
}

- (void)didReceiveMemoryWarning {
    [superdidReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}
- (void)buttonClick:(UIButton *)button{
  
    //返回上一个视图
    [selfdismissViewControllerAnimated:NOcompletion:nil];
}
/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/

@end