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 p_w_picpath (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: