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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
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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:
