UISegmentedControl详解-优快云博客

当用户输入不仅仅是布尔值时，可使用分段控件（UISegmentedControl）。分段控件提供一栏按钮（有时称为按钮栏），但只能激活其中一个按钮。分段控件会导致用户在屏幕上看到的内容发生变化。它们常用于在不同类别的信息之间选择，或在不同的应用屏幕之间切换。下面介绍基本属性和基本方法的使用。

[代码]c#/cpp/oc代码：

 
     1NSArray *segmentedArray = [[NSArrayalloc]initWithObjects:@"1",@"2",@"3",@"4",nil];  
 
     2    //初始化UISegmentedControl  
 
     3    UISegmentedControl *segmentedControl = [[UISegmentedControlalloc]initWithItems:segmentedArray];  
 
     4    segmentedControl.frame = CGRectMake(20.0, 20.0, 250.0, 50.0);  
 
     5    segmentedControl.selectedSegmentIndex = 2;//设置默认选择项索引  
 
     6    segmentedControl.tintColor = [UIColor redColor];  
 
     7　　//有基本四种样式
 
     8    segmentedControl.segmentedControlStyle = UISegmentedControlStylePlain;//设置样式

[代码]c#/cpp/oc代码：

`1`	`//segmentedControl.segmentedControlStyle = UISegmentedControlStyleBordered;//设置样式`

[代码]c#/cpp/oc代码：

`1`	`//segmentedControl.segmentedControlStyle = UISegmentedControlStyleBar;//设置样式`

[代码]c#/cpp/oc代码：

`1`	`//segmentedControl.segmentedControlStyle = UISegmentedControlStyleBezeled;//设置样式`

[代码]c#/cpp/oc代码：

`1`	`// segmentedControl.momentary = YES;//设置在点击后是否恢复原样`

`2`	`[segmentedControl setTitle:@"two"` `forSegmentAtIndex:1];//设置指定索引的题目`

[代码]c#/cpp/oc代码：

`1`	`[segmentedControl setImage:[UIImage imageNamed:@"btn_jyy.png"] forSegmentAtIndex:3];//设置指定索引的图片`

[代码]c#/cpp/oc代码：

`1`	`[segmentedControl insertSegmentWithImage:[UIImage imageNamed:@"mei.png"] atIndex:2 animated:NO];//在指定索引插入一个选项并设置图片`

[代码]c#/cpp/oc代码：

`1`	`[segmentedControl insertSegmentWithTitle:@"insert"` `atIndex:3 animated:NO];//在指定索引插入一个选项并设置题目`

[代码]c#/cpp/oc代码：

`1`	`[segmentedControl removeSegmentAtIndex:0 animated:NO];//移除指定索引的选项`

[代码]c#/cpp/oc代码：

 
     01//   [segmentedControl setWidth:70.0 forSegmentAtIndex:2];//设置指定索引选项的宽度  
 
     02//   [segmentedControl setContentOffset:CGSizeMake(10.0,10.0) forSegmentAtIndex:4];//设置选项中图片等的左上角的位置  
 
     03    
 
     04    //获取指定索引选项的图片imageForSegmentAtIndex：  
 
     05    UIImageView *imageForSegmentAtIndex = [[UIImageViewalloc]initWithImage:[segmentedControl imageForSegmentAtIndex:1]];  
 
     06    imageForSegmentAtIndex.frame = CGRectMake(60.0, 120.0, 30.0, 30.0);  ;
 
     07    
 
     08    //获取指定索引选项的标题titleForSegmentAtIndex  
 
     09    UILabel *titleForSegmentAtIndex = [[UILabel alloc]initWithFrame:CGRectMake(100.0, 160.0, 30.0, 30.0)];  
 
     10    titleForSegmentAtIndex.text = [segmentedControl titleForSegmentAtIndex:0];  
 
     11    
 
     12    //获取总选项数segmentedControl.numberOfSegments  
 
     13    UILabel *numberOfSegments = [[UILabel alloc]initWithFrame:CGRectMake(140.0, 170.0, 30.0, 30.0)];  
 
     14    numberOfSegments.text = [NSString stringWithFormat:@"%d",segmentedControl.numberOfSegments]; 
 
     15
 
     16    //获取指定索引选项的宽度widthForSegmentAtIndex：  
 
     17    UILabel *widthForSegmentAtIndex = [[UILabel alloc]initWithFrame:CGRectMake(180.0, 210.0, 70.0, 30.0)];  
 
     18    widthForSegmentAtIndex.text = [NSString stringWithFormat:@"%f",[segmentedControl widthForSegmentAtIndex:2]];  
 
     19     
 
     20   // [segmentedControl setEnabled:NO forSegmentAtIndex:4];//设置指定索引选项不可选  
 
     21   // BOOL enableFlag = [segmentedControl isEnabledForSegmentAtIndex:4];//判断指定索引选项是否可选  
 
     22      [mySegmentedControladdTarget:selfaction:@selector(segmentAction:)forControlEvents:UIControlEventValueChanged];  //添加委托方法
 
     23//具体委托方法实例   
 
     24-(void)segmentAction:(UISegmentedControl *)Seg{
 
     25    NSInteger Index = Seg.selectedSegmentIndex;
 
     26    NSLog(@"Index %i", Index);
 
     27    switch (Index) {
 
     28        case 0:
 
     29            [self selectmyView1];
 
     30            break;
 
     31        case 1:
 
     32            [self selectmyView2];
 
     33            break;
 
     34        case 2:
 
     35            [self selectmyView3];
 
     36            break;
 
     37        case 3:
 
     38            [self selectmyView4];
 
     39            break;
 
     40        case 4:
 
     41            [self selectmyView5];
 
     42            break;
 
     43        case 5:
 
     44            [self selectmyView6];
 
     45            break;    
 
     46        default:
 
     47            break;
 
     48    }
 
     49}

基本属性、方法如上，大家在实际开发中可根据实际需求选取适当属性和方法。

使用技巧：

在导航栏中添加UISegmentedControl ，实现的效果：

实现的代码：

[代码]c#/cpp/oc代码：

 
     01//自定义UISegmentedcontrol
 
     02UISegmentedControl *segmentedControl=[[UISegmentedControl alloc] initWithFrame:CGRectMake(80.0f, 8.0f, 200.0f, 30.0f) ]; 
 
     03    [segmentedControl insertSegmentWithTitle:@"Food to eat" atIndex:0 animated:YES]; 
 
     04    [segmentedControl insertSegmentWithTitle:@"Food to avoid" atIndex:1 animated:YES]; 
 
     05    segmentedControl.segmentedControlStyle = UISegmentedControlStyleBar; 
 
     06    segmentedControl.momentary = YES; 
 
     07    segmentedControl.multipleTouchEnabled=NO; 
 
     08    [segmentedControl addTarget:self action:@selector(Selectbutton:) forControlEvents:UIControlEventValueChanged]; 
 
     09    UIBarButtonItem *segButton = [[UIBarButtonItem alloc] initWithCustomView:segmentedControl];  //自定义UIBarButtonItem，封装定义好的UIsegmented。
 
     10    [segmentedControl release]; 
 
     11    self.navigationItem.rightBarButtonItem = segButton;  //添加到导航栏中
 
     12    [segButton release];