UISegmentedControl的详细使用

UISegmentedControl的详细使用

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

//segmentedControl.segmentedControlStyle = UISegmentedControlStyleBordered;//设置样式
//segmentedControl.segmentedControlStyle = UISegmentedControlStyleBar;//设置样式
//segmentedControl.segmentedControlStyle = UISegmentedControlStyleBezeled;//设置样式

// segmentedControl.momentary =YES;//设置在点击后是否恢复原样
[segmentedControlsetTitle:@"two" forSegmentAtIndex:1];//设置指定索引的题目
[segmentedControl setImage:[UIImageimageNamed:@"btn_jyy.png"] forSegmentAtIndex:3];//设置指定索引的图片
[segmentedControl insertSegmentWithImage:[UIImageimageNamed:@"mei.png"] atIndex:2 animated:NO];//在指定索引插入一个选项并设置图片

[segmentedControlinsertSegmentWithTitle:@"insert" atIndex:3 animated:NO];//在指定索引插入一个选项并设置题目
[segmentedControl removeSegmentAtIndex:0animated:NO];//移除指定索引的选项
// [segmentedControl setWidth:70.0forSegmentAtIndex:2];//设置指定索引选项的宽度
// [segmentedControlsetContentOffset:CGSizeMake(10.0,10.0) forSegmentAtIndex:4];//设置选项中图片等的左上角的位置

//获取指定索引选项的图片imageForSegmentAtIndex：
UIImageView *imageForSegmentAtIndex=[[UIImageViewalloc]initWithImage:[segmentedControl imageForSegmentAtIndex:1]];
imageForSegmentAtIndex.frame = CGRectMake(60.0, 120.0, 30.0, 30.0); ;

//获取指定索引选项的标题titleForSegmentAtIndex
UILabel *titleForSegmentAtIndex =[[UILabel alloc]initWithFrame:CGRectMake(100.0, 160.0, 30.0, 30.0)];
titleForSegmentAtIndex.text =[segmentedControl titleForSegmentAtIndex:0];

//获取总选项数segmentedControl.numberOfSegments
UILabel *numberOfSegments =[[UILabel alloc]initWithFrame:CGRectMake(140.0, 170.0, 30.0, 30.0)];
numberOfSegments.text =[NSString stringWithFormat:@"%d",segmentedControl.numberOfSegments];

//获取指定索引选项的宽度widthForSegmentAtIndex：
UILabel *widthForSegmentAtIndex =[[UILabel alloc]initWithFrame:CGRectMake(180.0, 210.0, 70.0, 30.0)];
widthForSegmentAtIndex.text =[NSString stringWithFormat:@"%f",[segmentedControl widthForSegmentAtIndex:2]];

// [segmentedControl setEnabled:NOforSegmentAtIndex:4];//设置指定索引选项不可选
// BOOL enableFlag = [segmentedControlisEnabledForSegmentAtIndex:4];//判断指定索引选项是否可选
[mySegmentedControladdTarget:selfaction:@selector(segmentAction:)forControlEvents:UIControlEventValueChanged]; //添加委托方法
//具体委托方法实例
-(void)segmentAction:(UISegmentedControl *)Seg{
NSInteger Index =Seg.selectedSegmentIndex;
NSLog(@"Index %i", Index);
switch (Index) {
case 0:
[self selectmyView1];
break;
case 1:
[self selectmyView2];
break;
case 2:
[self selectmyView3];
break;
case 3:
[self selectmyView4];
break;
case 4:
[self selectmyView5];
break;
case 5:
[self selectmyView6];
break;
default:
break;
}
}

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：
//自定义UISegmentedcontrol
UISegmentedControl *segmentedControl=[[UISegmentedControlalloc] initWithFrame:CGRectMake(80.0f, 8.0f, 200.0f, 30.0f)]; 


[segmentedControl insertSegmentWithTitle:@"Food toeat" atIndex:0 animated:YES]; 


[segmentedControl insertSegmentWithTitle:@"Food toavoid" atIndex:1 animated:YES]; 


segmentedControl.segmentedControlStyle =UISegmentedControlStyleBar; 


segmentedControl.momentary =YES; 


segmentedControl.multipleTouchEnabled=NO; 


[segmentedControl addTarget:selfaction:@selector(Selectbutton:) forControlEvents:UIControlEventValueChanged]; 


UIBarButtonItem *segButton = [[UIBarButtonItem alloc]initWithCustomView:segmentedControl];

//自定义UIBarButtonItem，封装定义好的UIsegmented。


[segmentedControl release]; 


self.navigationItem.rightBarButtonItem = segButton;

//添加到导航栏中


[segButton release];