1 前言
UISegmentedController類似於單選按鈕，可以提供選擇操作，今天我們就來學習一下其簡單用法。

2 UISegmentedController簡介
上代碼

.h文件

[plain]
#import <UIKit/UIKit.h> 
 
@interface ZYViewController : UIViewController 
 
@property(nonatomic,strong) UISegmentedControl *mySegmentedControl; 
 
@end 

#import <UIKit/UIKit.h>

@interface ZYViewController : UIViewController

@property(nonatomic,strong) UISegmentedControl *mySegmentedControl;

@end
.m文件：

[plain]
@synthesize mySegmentedControl; 
 
- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view, typically from a nib. 
    self.view.backgroundColor = [UIColor whiteColor]; 
    //初始化內容數組 
    NSArray *segments = [[NSArray alloc] initWithObjects:@"iPhone",[UIImage imageNamed:@"ipad.png"],@"iPod",@"iMac",nil]; 
//    NSArray *segments = [[NSArray alloc] initWithObjects:@"iPhone",@"iPad",@"iPod",@"iMac",nil]; 
    //構造mySegmentedControl的外形 
    self.mySegmentedControl = [[UISegmentedControl alloc] initWithItems:segments]; 
    CGRect segmentedFrame = self.mySegmentedControl.frame; 
    segmentedFrame.size.height = 64.0f; 
    segmentedFrame.size.width = 300.0f; 
    self.mySegmentedControl.frame = segmentedFrame; 
    self.mySegmentedControl.center = self.view.center; 
    self.mySegmentedControl.segmentedControlStyle = UISegmentedControlStyleBar;//修改樣式 
    self.mySegmentedControl.momentary = YES;//選擇了某項後，馬上變回原始狀態 
    [self.mySegmentedControl addTarget:self action:@selector(segmentChanged:) forControlEvents:UIControlEventValueChanged];//添加事件 
    [self.view addSubview:self.mySegmentedControl]; 
} 
 
-(void)segmentChanged:(UISegmentedControl *)paramSender{ 
    if ([paramSender isEqual:self.mySegmentedControl]) { 
        //獲得索引位置 
        NSInteger selectedSegmentIndex = [paramSender selectedSegmentIndex]; 
        //獲得對應索引位置的text值 
        NSString *selectedSegmentText = [paramSender titleForSegmentAtIndex:selectedSegmentIndex]; 
        NSLog(@"Segment %ld with %@ text is selected",(long)selectedSegmentIndex,selectedSegmentText); 
    } 
} 

@synthesize mySegmentedControl;

- (void)viewDidLoad
{
    [super viewDidLoad];
 // Do any additional setup after loading the view, typically from a nib.
    self.view.backgroundColor = [UIColor whiteColor];
    //初始化內容數組
    NSArray *segments = [[NSArray alloc] initWithObjects:@"iPhone",[UIImage imageNamed:@"ipad.png"],@"iPod",@"iMac",nil];
//    NSArray *segments = [[NSArray alloc] initWithObjects:@"iPhone",@"iPad",@"iPod",@"iMac",nil];
    //構造mySegmentedControl的外形
    self.mySegmentedControl = [[UISegmentedControl alloc] initWithItems:segments];
    CGRect segmentedFrame = self.mySegmentedControl.frame;
    segmentedFrame.size.height = 64.0f;
    segmentedFrame.size.width = 300.0f;
    self.mySegmentedControl.frame = segmentedFrame;
    self.mySegmentedControl.center = self.view.center;
    self.mySegmentedControl.segmentedControlStyle = UISegmentedControlStyleBar;//修改樣式
    self.mySegmentedControl.momentary = YES;//選擇了某項後，馬上變回原始狀態
    [self.mySegmentedControl addTarget:self action:@selector(segmentChanged:) forControlEvents:UIControlEventValueChanged];//添加事件
    [self.view addSubview:self.mySegmentedControl];
}

-(void)segmentChanged:(UISegmentedControl *)paramSender{
    if ([paramSender isEqual:self.mySegmentedControl]) {
        //獲得索引位置
        NSInteger selectedSegmentIndex = [paramSender selectedSegmentIndex];
        //獲得對應索引位置的text值
        NSString *selectedSegmentText = [paramSender titleForSegmentAtIndex:selectedSegmentIndex];
        NSLog(@"Segment %ld with %@ text is selected",(long)selectedSegmentIndex,selectedSegmentText);
    }
}運行後結果：

 
 

點擊各個按鈕後控制太顯示如下：

2013-04-23 10:30:00.543 UISegmentedControllerTest[985:c07] Segment 0 with iPhone text is selected

2013-04-23 10:30:01.045 UISegmentedControllerTest[985:c07] Segment 1 with (null) text is selected

2013-04-23 10:30:01.501 UISegmentedControllerTest[985:c07] Segment 2 with iPod text is selected

2013-04-23 10:30:01.862 UISegmentedControllerTest[985:c07] Segment 3 with iMac text is selected