UISegmentControl

最新推荐文章于 2019-08-03 17:36:14 发布

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最新推荐文章于 2019-08-03 17:36:14 发布

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本文详细介绍了如何在iOS应用中使用UISegmentedControl组件，包括初始化、设置样式、插入和删除选项、设置标题和图片等功能，并展示了如何获取组件的状态信息。

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- (void)viewDidLoad {
NSArray *segmentedArray = [[NSArray alloc]initWithObjects:@"1",@"2",@"3",@"4",nil];
//初始化UISegmentedControl
UISegmentedControl * segmentedControl = [[UISegmentedControl alloc]initWithItems:segmentedArray];
segmentedControl.frame = CGRectMake(60.0, 10.0, 200.0, 50.0);
segmentedControl.segmentedControlStyle = 2;
[segmentedControl setTitle:@"two" forSegmentAtIndex:1];//设置指定索引的题目
[segmentedControl setImage:[UIImage imageNamed:@"lan.png"] forSegmentAtIndex:3];//设置指定索引的图片
[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
[segmentedControl insertSegmentWithTitle:@"insert" atIndex:3 animated:NO];//在指定索引插入一个选项并设置题目
[segmentedControl removeSegmentAtIndex:0 animated:NO];//移除指定索引的选项
[segmentedControl setWidth:70.0 forSegmentAtIndex:2];//设置指定索引选项的宽度
[segmentedControl setContentOffset:CGSizeMake(10.0,10.0) forSegmentAtIndex:1];//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 = [[UIImageView alloc]initWithImage:[segmentedControl imageForSegmentAtIndex:1]];
imageForSegmentAtIndex.frame = CGRectMake(60.0, 100.0, 30.0, 30.0);
//获取指定索引选项的标题titleForSegmentAtIndex
UILabel *titleForSegmentAtIndex = [[UILabel alloc]initWithFrame:CGRectMake(100.0, 100.0, 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, 100.0, 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, 100.0, 70.0, 30.0)];
widthForSegmentAtIndex.text = [NSString stringWithFormat:@"%f",[segmentedControl widthForSegmentAtIndex:2]];
segmentedControl.selectedSegmentIndex = 2;//设置默认选择项索引
segmentedControl.tintColor = [UIColor redColor];
segmentedControl.segmentedControlStyle = UISegmentedControlStylePlain;//设置样式
segmentedControl.momentary = YES;//设置在点击后是否恢复原样
[segmentedControl setEnabled:NO forSegmentAtIndex:4];//设置指定索引选项不可选
BOOL enableFlag = [segmentedControl isEnabledForSegmentAtIndex:4];//判断指定索引选项是否可选
NSLog(@"%d",enableFlag);
}