IOS學習筆記(七)之UISegmentedControl分段控制項的基本概念和使用方法

IOS學習筆記(七)之UISegmentedControl分段控制項的基本概念和使用方法(部落格地址：http://blog.csdn.net/developer_jiangqq)

Author:hmjiangqq

Email:jiangqqlmj@163.com

UISegmentedControl

首先看下官網介紹:

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.

分段控制項是一種選擇控制項，功能有點類似於Windows中的選項按鈕，由兩端或者更多段組成，

每個段相當於一個獨立的按鈕。這控制項一般有兩種樣式-Plain&Bordered樣式和Bar樣式，

Bordered樣式是在Plain樣式上面加上了一個邊框.Plain和Bordered樣式中每一段都可以設定文本

和添加圖片.Bar樣式整體來說比較窄，在其中我們一般不會放置圖片。

常用的屬性和方法如下:

執行個體代碼如下:

- (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=@[@"搜尋",@"選擇",@"視頻",@"圖片"];    UISegmentedControl *segmentControl=[[UISegmentedControl alloc]initWithItems:array];    segmentControl.segmentedControlStyle=UISegmentedControlStyleBordered;    //設定位置 大小    segmentControl.frame=CGRectMake(60, 100, 200, 40);    //預設選擇    segmentControl.selectedSegmentIndex=1;    //設定背景色    segmentControl.tintColor=[UIColor greenColor];    //設定監聽事件    [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);}

運行: