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IOS学习笔记(七)之UISegmentedControl分段控件的基本概念和使用方法

2014-02-28 10:44 996 查看
IOS学习笔记(七)之UISegmentedControl分段控件的基本概念和使用方法 Author:hmjiangqq Email:jiangqqlmj@163.comUISegmentedControl首先看下官网介绍:


A
UISegmentedControl
object is a horizontal control made of multiple segments, each segment functioning as a discrete button. A segmented control affords a compact means to group together a number of controls. A segmented control can display a title (an
NSString
object) or an image (
UIImage
object). The
UISegmentedControl
object automatically resizes segments to fit proportionally within their superview unless they have a specific width set. When you add and remove segments, you can request that the action be animated with sliding and fading effects.分段控件是一种选择控件,功能有点类似于Windows中的单选按钮,由两端或者更多段组成,

每个段相当于一个独立的按钮。这控件一般有两种样式-Plain&Bordered样式和Bar样式,Bordered样式是在Plain样式上面加上了一个边框.Plain和Bordered样式中每一段都可以设置文本和添加图片.Bar样式整体来说比较窄,在其中我们一般不会放置图片。常用的属性和方法如下:




实例代码如下:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {     self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];     // Override point for customization after application launch.     self.window.backgroundColor = [UIColor whiteColor];          NSArray *array=@[@"搜索",@"选择",@"视频",@"图片"];     UISegmentedControl *segmentControl=[[UISegmentedControl alloc]initWithItems:array];     segmentControl.segmentedControlStyle=UISegmentedControlStyleBordered;     //设置位置 大小     segmentControl.frame=CGRectMake(60, 100, 200, 40);     //默认选择     segmentControl.selectedSegmentIndex=1;     //设置背景色     segmentControl.tintColor=[UIColor greenColor];     //设置监听事件     [segmentControl addTarget:self action:@selector(change:) forControlEvents:UIControlEventValueChanged];     [self.window addSubview:segmentControl];     [segmentControl release];          [self.window makeKeyAndVisible];     return YES; }  -(void)change:(UISegmentedControl *)segmentControl{     NSLog(@"segmentControl %d",segmentControl.selectedSegmentIndex); }
运行截图:



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