CustomView

一丶

#import "AppDelegate.h"

#import "LTView.h"

@interface AppDelegate ()

@end

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

    // Override point for customization after application launch.

    self.window.backgroundColor = [UIColor whiteColor];

    [self.window makeKeyAndVisible];

    [_window release];

    

    // 自定义View

    LTView *ltView = [[LTView alloc] initWithFrame:CGRectMake(30, 50, 295, 50)];

    ltView.myTextField.placeholder = @"请输入用户名";

    ltView.myLabel.backgroundColor = [UIColor magentaColor];

    [self.window addSubview:ltView];

    [ltView release];

    

    return YES;

}

- (void)dealloc

{

    [_window release];

    [super dealloc];

}

二,自定义View

#import <UIKit/UIKit.h>

@interface LTView : UIView

// 自定义控件一般来说会把自带的视图写成属性，方便外部使用

@property (nonatomic, retain)UILabel *myLabel;

@property (nonatomic, retain)UITextField *myTextField;

@end

#import "LTView.h"

@implementation LTView

- (instancetype)initWithFrame:(CGRect)frame

{

    self = [super initWithFrame:frame];

    if (self) {

        // 在view的初始化方法中，对所有的子视图进行初始化创建

        self.myLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, frame.size.width / 3, frame.size.height)];

        self.myLabel.backgroundColor = [UIColor orangeColor];

        [self addSubview:self.myLabel];

        [_myLabel release];

        

        

        self.myTextField = [[UITextField alloc] initWithFrame:CGRectMake(frame.size.width / 3 + 20, 0, frame.size.width * 2 / 3 - 20, frame.size.height)];

        self.myTextField.placeholder = @"请输入";

        self.myTextField.borderStyle = UITextBorderStyleRoundedRect;

        self.myTextField.clearButtonMode = UITextFieldViewModeAlways;

        self.myTextField.backgroundColor = [UIColor whiteColor];

        [self addSubview:self.myTextField];

        [_myTextField release];

        

    }

    return self;

}

- (void)dealloc

{

    [_myLabel release];

    [_myTextField release];

    [super dealloc];

}