iOS中UILabel和UIButton的自定义设置

这是使用empty application 创建的工程，这里主要是在 didFinshLaunchingWithoptions:方法中操作。

#import <UIKit/UIKit.h>

@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong,nonatomic) UILabel *message;
@property (strong, nonatomic) UIWindow *window;

@end

#import "AppDelegate.h"

@implementation AppDelegate

//*************************ios版本是6.1*************************

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    //设置应用的窗口大小，uiscreen（）获取主屏幕的大小
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    
    // Override point for customization after application launch.
    self.window.backgroundColor = [UIColor grayColor];
    
    
    //UIViewController *rootViewControler = [[UIViewController alloc]init];
    
    //生成一个标签，通过frame的方式的设置坐标和大小
    self.message  = [[UILabel alloc]initWithFrame:CGRectMake(70, 200, 200, 20)];
    
    //设置uilabel的字体对齐方式，在ios6中使用NSTextAlignment，UITextAlignment不被支持
    //这是UITextAlignment的定义
    /*************************************************     
     enum {
     UITextAlignmentLeft = 0,
     UITextAlignmentCenter,
     UITextAlignmentRight,                   
     } NS_DEPRECATED_IOS(2_0,6_0);
     typedef NSTextAlignment UITextAlignment;
     *************************************************/
    
    //这是NSTextAlignment的定义
    /**************************************************
     enum {
     NSTextAlignmentLeft      = 0,
     NSTextAlignmentCenter    = 1,
     NSTextAlignmentRight     = 2,
     NSTextAlignmentJustified = 3,
     NSTextAlignmentNatural   = 4,
     };
     typedef NSInteger NSTextAlignment;
     *************************************************/
    //message.textAlignment = 1等价于 = NSTextAlignmentCenter；并且3，4是不可用的
    self.message.textAlignment = 1;
    
    //设置标签上面的文本
    self.message.text = @"Hello World!";
    
    //设置标签上面的文本颜色
    self.message.textColor = [UIColor blueColor];
    
    //设置标签字体大小
    self.message.font = [UIFont systemFontOfSize:23];
    
    //将标签添加为window的子view
    [self.window addSubview:self.message];
    
    //设置自定义的一个按钮，type设置为圆角矩形
    UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect ];
    button.frame = CGRectMake(130, 250, 90 , 40);
    button.backgroundColor = [UIColor blackColor];
    [button setTitle:@"Hello" forState:UIControlStateNormal];
    [button setTitle:@"Hi,Go" forState:UIControlStateHighlighted];
    
    //设置button的不同状态的图片样式
    UIImage *normalImage = [UIImage imageNamed:@"屏幕快照 2013-05-26 上午10.45.15.png"];
    UIImage *pressImage = [UIImage imageNamed:@"屏幕快照 2013-05-26 上午10.44.30.png"];

    /*
     UIControlState,<< 这种位操作符表示这几个选项可以叠加
     typedef NS_OPTIONS(NSUInteger, UIControlState) {
     UIControlStateNormal       = 0,
     UIControlStateHighlighted  = 1 << 0,                  // used when UIControl isHighlighted is set
     UIControlStateDisabled     = 1 << 1,
     UIControlStateSelected     = 1 << 2,                  // flag usable by app (see below)
     UIControlStateApplication  = 0x00FF0000,              // additional flags available for application use
     UIControlStateReserved     = 0xFF000000               // flags reserved for internal framework use
     };
     */
    [button setBackgroundImage:normalImage forState:UIControlStateNormal];
    [button setBackgroundImage:pressImage forState:UIControlStateHighlighted];
    
    //给button添加事件和操作方法，@selector（）通过hash映射的方式将方法转换，方便系统查找，提高效率
    [button addTarget:self action:@selector(click) forControlEvents:UIControlEventTouchUpInside];
    
    [self.window addSubview:button];
    //button.currentTitle = @"Hello";

    
    //测试NSDate
    NSDate *date = [NSDate date];
    NSLog(@"[NSDate date] is %@",date);
    NSDate *userDate = [[NSDate alloc]init];
    NSLog(@"[NSDate userDate] is %@",userDate);
    [date earlierDate:userDate];
    
    NSLog(@"self.window.subviews : %@",self.window.subviews);
    [self.window makeKeyAndVisible];
    return YES;;
    
}

#pragma mark buttonClickEvent
- (void) click
{
    //静态局部变量做为控制开关
    static BOOL flag;
    if (flag == 0) {
        self.message.text = @"Hello Xcode!";
        flag =!flag;
    } else {
        self.message.text = @"Hello World!";
        flag =!flag;

    }
    
}

这里可以看到self.window.subviews的输出结果，有我们的label和button。

2013-05-26 12:41:10.233 emptyProject[10376:11303] self.window.subviews : (
"<UILabel: 0x76791b0; frame = (70 200; 200 20); text = 'Hello World!'; clipsToBounds = YES; userInteractionEnabled = NO; layer = <CALayer: 0x7679290>>",
"<UIRoundedRectButton: 0x767b5d0; frame = (130 250; 90 40); opaque = NO; layer = <CALayer: 0x767b740>>"