UISegmentedControl用法详解

1、基本用法：

- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.view.backgroundColor = [UIColor whiteColor];

UISegmentedControl * segmented = [[UISegmentedControl alloc] initWithItems:@[@"1", @"2", @"3"]];
segmented.frame = CGRectMake(100, 100, 150, 50);
segmented.selectedSegmentIndex = 0; //设置默认选中项
[segmented addTarget:self action:@selector(segmentedAction:) forControlEvents:UIControlEventValueChanged]; //添加事件
[self.view addSubview:segmented];
}

- (void) segmentedAction:(id)sender {
if ([sender isKindOfClass:[UISegmentedControl class]]) {
UISegmentedControl * segment = sender;
if (segment.selectedSegmentIndex == 0) {
self.view.backgroundColor = [UIColor redColor];
}else if (segment.selectedSegmentIndex == 1) {
self.view.backgroundColor = [UIColor brownColor];
}else if (segment.selectedSegmentIndex == 2) {
self.view.backgroundColor = [UIColor blueColor];
}
}
}

2、设置选中部分的颜色

NSUInteger numbers = segmented.numberOfSegments; // 返回总共有几个部分，只读属性
segmented.tintColor = [UIColor purpleColor]; //设置选中部分的颜色

3、注：ios7后segmentedControlStyle属性不再有任何影响

4、不显示选中部分状态

segmented.momentary = YES; //默认为NO

5、使用图片

使用图片前要先说一下，并不是所有的图片都可以，需要透明全品质图片。如果没有，可以有简单的方法自己制作一些透明全品质图片做测试用，下面给出制作方法：

（当然，如果你是PS大神，那就不用看了，那种图片还不是手到擒来）

首先，进入在线PS：http://www.webps.cn/

创建一张新图片：



设置一下图片大小：



在图片上随便加一些文字，然后保存为透明，全品质图像：



这样测试图片就有了。

将UISegmentControl的每一部分用图片表示：

测试代码：

- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.view.backgroundColor = [UIColor whiteColor];

UIImage * pic1Image = [UIImage imageNamed:@"my1.png"];
UIImage * pic2Image = [UIImage imageNamed:@"my2.png"];
UIImage * pic3Image = [UIImage imageNamed:@"my3.png"];
NSArray * images = @[pic1Image, pic2Image, pic3Image];

UISegmentedControl * segmented = [[UISegmentedControl alloc] initWithItems:images];
segmented.frame = CGRectMake(100, 100, 150, 50);
segmented.selectedSegmentIndex = 0; //设置默认选中项
[segmented addTarget:self action:@selector(segmentedAction:) forControlEvents:UIControlEventValueChanged];
[self.view addSubview:segmented];

// NSUInteger numbers = segmented.numberOfSegments; // 返回总共有几个部分，只读属性
// segmented.tintColor = [UIColor purpleColor]; //设置选中部分的颜色
// segmented.momentary = YES; //默认为NO YES表示按钮按下后很快恢复

}

- (void) segmentedAction:(id)sender {
if ([sender isKindOfClass:[UISegmentedControl class]]) {
UISegmentedControl * segment = sender;
if (segment.selectedSegmentIndex == 0) {
//点击换为另外的图片
UIImage * image = [UIImage imageNamed:@"yuan.png"];
[segment setImage:image forSegmentAtIndex:0];
// self.view.backgroundColor = [UIColor redColor];
}else if (segment.selectedSegmentIndex == 1) {
//点击换为文字
[segment setTitle:@"second" forSegmentAtIndex:1];
// self.view.backgroundColor = [UIColor brownColor];
}else if (segment.selectedSegmentIndex == 2) {
// self.view.backgroundColor = [UIColor blueColor];
}
}
}初始：



点击二，变为文字second：



点击三，无变化：



点击一，变为另外的图片：



6、某一选项设置为不可选择：

[segmented setEnabled:NO forSegmentAtIndex:1];设置为NO即为不可选择
7、插入删除：

#import "ViewController.h"

@interface ViewController ()
{
UISegmentedControl * segmented;
}
@end

@implementation ViewController

- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.view.backgroundColor = [UIColor whiteColor];

segmented = [[UISegmentedControl alloc] initWithItems:@[@"1", @"2", @"3"]];

segmented.frame = CGRectMake(100, 100, 150, 50);
segmented.selectedSegmentIndex = 0; //设置默认选中项

[self.view addSubview:segmented];

UIButton * btn1 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
btn1.frame = CGRectMake(100, 200, 50, 30);
[btn1 setTitle:@"插入" forState:UIControlStateNormal];
[btn1 setBackgroundColor:[UIColor brownColor]];
[self.view addSubview:btn1];
[btn1 addTarget:self action:@selector(insertSeg) forControlEvents:UIControlEventTouchUpInside];

UIButton * btn2 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
btn2.frame = CGRectMake(180, 200, 50, 30);
[btn2 setTitle:@"删除" forState:UIControlStateNormal];
[btn2 setBackgroundColor:[UIColor brownColor]];
[self.view addSubview:btn2];
[btn2 addTarget:self action:@selector(deleteSeg) forControlEvents:UIControlEventTouchUpInside];

// NSUInteger numbers = segmented.numberOfSegments; // 返回总共有几个部分，只读属性
// segmented.tintColor = [UIColor purpleColor]; //设置选中部分的颜色
// segmented.momentary = YES; //默认为NO YES表示按钮按下后很快恢复
// [segmented setEnabled:NO forSegmentAtIndex:1];

}

- (void) insertSeg {
[segmented insertSegmentWithTitle:@"insert" atIndex:segmented.selectedSegmentIndex animated:YES];
}

- (void) deleteSeg {
[segmented removeSegmentAtIndex:segmented.selectedSegmentIndex animated:YES];
}初始：



点击插入：



点击删除：