【UISegmentedControl】

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

{

self.window=[[UIWindowalloc]initWithFrame:[[UIScreenmainScreen]bounds]];

self.window.backgroundColor=[UIColorwhiteColor];

UIViewController *v=[[UIViewControlleralloc]init];

self.window.rootViewController=v;

[self.windowmakeKeyAndVisible];

//创建数组，内容是分段控件的各分区标题

NSArray *ns=[[NSArrayalloc]initWithObjects:@"enter",@"come",@"system",nil];

//创建分段控件

UISegmentedControl *segment=[[UISegmentedControlalloc]initWithItems:ns];

//设置控件大小

segment.frame=CGRectMake(30,40, 200, 50);

//初始选中第一位置的区

[segment setSelectedSegmentIndex:1];

//给控件设置目标事件

[segment addTarget:selfaction:@selector(visibel:)forControlEvents:UIControlEventValueChanged];

//创建标签及大小

label=[[UILabelalloc]initWithFrame:CGRectMake(250,40, 70, 50)];

label.backgroundColor=[UIColorgreenColor];

[self.windowaddSubview:segment];

[self.windowaddSubview:label];

//UIViewController *v=[[UIViewController alloc]init];

return YES;

}

-(void)visibel:(UISegmentedControl *)sender

{

//测试控件各分区的索引位置

NSLog(@"%d",(int)[senderselectedSegmentIndex]);

//让标签显示的文本等于当前选中的控件分区标题

label.text=[sendertitleForSegmentAtIndex:[sender selectedSegmentIndex]];

//文本方向置中

label.textAlignment=NSTextAlignmentCenter;

}