在UITableView顶部制作简单的UISegmentControl实例方法

如上图: 分两步:

一、创建320长度背景，高不超过40最好

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1. //segment背景图
2. UIImageView *segBgImg = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"segmented_bg.png"]];
3. [segBgImg setUserInteractionEnabled:YES];
4. [segBgImg setFrame:CGRectMake(0, 44, 320, 38)];
5. //segment实例对象及初始化
6. UISegmentedControl *segment = [[UISegmentedControl alloc] initWithItems:nil];
7. segment.selectedSegmentIndex = 0;
8. [segment insertSegmentWithImage:[UIImage imageNamed:@"segmented_price_all_selected.png"] atIndex:0 animated:NO];
9. [segment insertSegmentWithImage:[UIImage imageNamed:@"segmented_price_free.png"] atIndex:1 animated:NO];
10. segment.frame = CGRectMake(10, 5, 184, 28);
11. [segment setMomentary:YES];
12. [segment addTarget:self action:@selector(segmentClick:) forControlEvents:UIControlEventValueChanged];
13. [segBgImg addSubview:segment];
14. [segment release];
15. [self.view addSubview:segBgImg];
16. [segBgImg release];

二、segmentClick相应事件中选中当前焦点

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1. //选择时触发
2. - (void)segmentClick:(UISegmentedControl *)segment
3. {
4. NSInteger index = segment.selectedSegmentIndex;
5. switch (index) {
6. case 0: //全部
7. [segment setImage:[UIImage imageNamed:@"segmented_price_all_selected.png"] forSegmentAtIndex:0];
8. [segment setImage:[UIImage imageNamed:@"segmented_price_free.png"] forSegmentAtIndex:1];
9. break;
10. case 1: //免费
11. [segment setImage:[UIImage imageNamed:@"segmented_price_all.png"] forSegmentAtIndex:0];
12. [segment setImage:[UIImage imageNamed:@"segmented_price_free_selected.png"] forSegmentAtIndex:1];
13. break;
14. }
15. }

1. - (void)viewDidLoad {
2. NSArray *segmentedArray = [[NSArray alloc]initWithObjects:@"1",@"2",@"3",@"4",nil];
3. //初始化UISegmentedControl
4. UISegmentedControl * segmentedControl = [[UISegmentedControl alloc]initWithItems:segmentedArray];
5. segmentedControl.frame = CGRectMake(60.0, 10.0, 200.0, 50.0);
6. segmentedControl.segmentedControlStyle = 2;
7. [segmentedControl setTitle:@"two" forSegmentAtIndex:1];//设置指定索引的题目
8. [segmentedControl setImage:[UIImage imageNamed:@"lan.png"] forSegmentAtIndex:3];//设置指定索引的图片
9. [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
10. [segmentedControl insertSegmentWithTitle:@"insert" atIndex:3 animated:NO];//在指定索引插入一个选项并设置题目
11. [segmentedControl removeSegmentAtIndex:0 animated:NO];//移除指定索引的选项
12. [segmentedControl setWidth:70.0 forSegmentAtIndex:2];//设置指定索引选项的宽度
13. [segmentedControl setContentOffset:CGSizeMake(10.0,10.0) forSegmentAtIndex:1];//设置选项中图片等的左上角的位置
14. //获取指定索引选项的图片imageForSegmentAtIndex：
15. UIImageView *imageForSegmentAtIndex = [[UIImageView alloc]initWithImage:[segmentedControl imageForSegmentAtIndex:1]];
16. imageForSegmentAtIndex.frame = CGRectMake(60.0, 100.0, 30.0, 30.0);
17. //获取指定索引选项的标题titleForSegmentAtIndex
18. UILabel *titleForSegmentAtIndex = [[UILabel alloc]initWithFrame:CGRectMake(100.0, 100.0, 30.0, 30.0)];
19. titleForSegmentAtIndex.text = [segmentedControl titleForSegmentAtIndex:0];
20. //获取总选项数segmentedControl.numberOfSegments
21. UILabel *numberOfSegments = [[UILabel alloc]initWithFrame:CGRectMake(140.0, 100.0, 30.0, 30.0)];
22. numberOfSegments.text = [NSString stringWithFormat:@"%d",segmentedControl.numberOfSegments];
23. //获取指定索引选项的宽度widthForSegmentAtIndex：
24. UILabel *widthForSegmentAtIndex = [[UILabel alloc]initWithFrame:CGRectMake(180.0, 100.0, 70.0, 30.0)];
25. widthForSegmentAtIndex.text = [NSString stringWithFormat:@"%f",[segmentedControl widthForSegmentAtIndex:2]];
26. segmentedControl.selectedSegmentIndex = 2;//设置默认选择项索引
27. segmentedControl.tintColor = [UIColor redColor];
28. segmentedControl.segmentedControlStyle = UISegmentedControlStylePlain;//设置样式
29. segmentedControl.momentary = YES;//设置在点击后是否恢复原样
30. [segmentedControl setEnabled:NO forSegmentAtIndex:4];//设置指定索引选项不可选
31. BOOL enableFlag = [segmentedControl isEnabledForSegmentAtIndex:4];//判断指定索引选项是否可选
32. NSLog(@"%d",enableFlag);
33. }

注： 多个segment切换时用for循环处理一下即可