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

     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.com

UISegmentedControl

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: