iOS开发——纯代码界面（UIViewController和文本类控件）

向右看齐 2022-07-29 11:58 155阅读 0赞

一、添加视图控制器（UIViewController）

创建一个ViewController类继承UIViewController  
ViewController.m做如下修改

- (void)viewDidLoad {
        [super viewDidLoad];
    
        //为了方便观察，设置背景颜色为蓝色
        self.view.backgroundColor = [UIColor blueColor];
    
    }

AppDelegate.m中做如下修改，记得导入ViewController类

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
        self.window = [[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds];
        ViewController *view = [[ViewController alloc]init];
        self.window.rootViewController = view;
        [self.window makeKeyAndVisible];
        return YES;
    }

运行程序就可以看到如下的界面

![这里写图片描述][20160417153811471]

二、添加UILable，UITextField，UITextView（文本类控件）

UILable，UITextField，UITextView这几个控件是在上面添加了UIController的基础上添加的，同样修改ViewController.m

- (void)viewDidLoad {
        [super viewDidLoad];
    
        //为了方便观察，设置背景颜色为蓝色
        self.view.backgroundColor = [UIColor blueColor];
    
        //设置控件lable的位置
        UILabel *lable = [[UILabel alloc] initWithFrame:CGRectMake(50, 50, 150, 50)];
    
        //设置lable文本内容为I am UILable
        [lable setText:@"I am UILable"];
    
        //设置lable文本中的文字居中
        /*
         UITextAlignmentCenter 居中
         UITextAlignmentLeft 左对齐
         UITextAlignmentRight 右对齐
         */
        lable.textAlignment = UITextAlignmentCenter;
    
        //把lable控件添加到当前的View上
        [self.view addSubview:lable];
    
        //设置控件textField的位置
        UITextField *textField = [[UITextField alloc] initWithFrame:CGRectMake(50, 100, 200, 200)];
        //设置控件textField的位置
        [textField setText:@"I am UITextField"];
    
        //把textField控件添加到当前的View上
        [self.view addSubview:textField];
    
        UITextView *textView = [[UITextView alloc] initWithFrame:CGRectMake(50, 300, 200, 100)];
    
        [textView setText:@"I am UITextView"];
    
        [self.view addSubview:textView];
    }

运行模拟器界面如下  
![这里写图片描述][20160417160517227]

[20160417153811471]: /images/20220724/e313f97a5527437fb91b82a1061e01e6.png
[20160417160517227]: /images/20220724/07ec7f70ac9042058efbc488f0f44ced.png