UI总结-UILabel,UITextField,UIButton

#import "AppDelegate.h"

@interface AppDelegate ()

@end

@implementation AppDelegate

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

// Override point for customization after application launch.

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

[self.window makeKeyAndVisible];

self.window.backgroundColor = [UIColor whiteColor];

UIViewController *vc = [[UIViewController alloc]init];

self.window.rootViewController = vc;

[_window release];

[vc release];

//UILabel是用于显示文本信息的UI控件,他的父类是UIView

UILabel *aLabel = [[UILabel alloc]initWithFrame:CGRectMake(20, 20, 200, 30)];

aLabel.backgroundColor = [UIColor redColor];

//UILabel的属性

//显示文本

aLabel.text = @"休杰克曼休杰克曼休杰克曼休杰克曼休杰克曼休杰克曼休杰克曼";

//文本在label中的位置 textAlignment枚举值0.1.2 左中右

aLabel.textAlignment = NSTextAlignmentCenter;

//修改文本的颜色,大小

aLabel.textColor = [UIColor blueColor];

aLabel.font = [UIFont systemFontOfSize:19];

//设置边框

aLabel.layer.borderWidth = 1;

//加边框弧度制

aLabel.layer.cornerRadius = 10;

//隐藏多余的分布

aLabel.layer.masksToBounds = YES;

//文本行数,当行数为0,表示不限行数

aLabel.numberOfLines = 0;

//如果先设置自适应后设置文本内容,会出现label消失的问题,所以一定要先设置文本内容,后设置尺寸自适应.

[aLabel sizeToFit];

//根据什么换行

aLabel.lineBreakMode = NSLineBreakByWordWrapping;

//设置阴影

aLabel.shadowColor = [UIColor cyanColor];

//设置阴影的尺寸

aLabel.shadowOffset = CGSizeMake(2, 2);

[self.window addSubview:aLabel];

[aLabel release];

//UITextField:用于接收用户输入文本的UI控件,他的父类是UIControl

UITextField *aTextField = [[UITextField alloc]initWithFrame:CGRectMake(20, 130, 200, 30)];

aTextField.backgroundColor = [UIColor grayColor];

//textfield的属性

//边框样式

aTextField.borderStyle = UITextBorderStyleRoundedRect;

//显示文本

//aTextField.text = @"金刚狼";

//占位字符串

aTextField.placeholder = @"请输入你要选择的商品";

//它也有font,textcolor,textalignment这些属性.

//设置弹出键盘样式,这个属性不是textfield的

aTextField.keyboardType = UIKeyboardTypeNumbersAndPunctuation;

//密文输入

aTextField.secureTextEntry = YES;

//UITextField可以设代理,我们可以用它来收键盘.它的代理方法都不是必须要写的.

aTextField.delegate = self;

[self.window addSubview:aTextField];

[aTextField release];

//UIButton:按钮,用于响应用户点击的控件,它的父类是UIControl

//button 是通过便利构造器来创建新对象的

UIButton *Button = [UIButton buttonWithType:UIButtonTypeCustom];

//两种button类型在使用上基本一致,就是system在设置的时候文字默认为蓝色,而出custom默认是白色,在设置图片的时候,system使用setimage方法图片无法显示,custemer可以正常显示.

Button.backgroundColor = [UIColor redColor];

Button.frame = CGRectMake(20, 180, 100, 30);

Button.layer.borderWidth = 1;

Button.layer.cornerRadius = 5;

[self.window addSubview:Button];

//button关联事件

[Button addTarget:self action:@selector(click:) forControlEvents:UIControlEventTouchUpInside];

//button的标题,标题的颜色

[Button setTitle:@"冰火之歌" forState:UIControlStateNormal];

[Button setTitle:@"高粱" forState:UIControlStateHighlighted];

[Button setTitleColor:[UIColor greenColor] forState:UIControlStateHighlighted

];

//设置button的背景图

[Button setImage:[UIImage imageNamed:@"818006c62c85ebc153a7b5a47c5efbd3.jpg"] forState:UIControlStateNormal];

return YES;

}

-(BOOL)textFieldShouldReturn:(UITextField *)textField{

[textField resignFirstResponder];

return YES;

}

-(void)click:(UIButton *)button{

NSLog(@"do click!");

}