UISegmentedControl的所有操作总结

最新推荐文章于 2025-04-27 10:24:03 发布

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#UISegmentedControl #所有 #操作 #总结

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本文详细介绍了UISegmentedControl的各种用法，包括初始化、管理段内容、管理段行为及外观等。通过实例展示了如何设置标题、图片、宽度等属性，并提供了如何获取段标题、图片等信息的方法。

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UISegmentedControl的所有操作总结:

#import "SegmentedControlTestViewController.h"  
    @implementation SegmentedControlTestViewController  
    @synthesize segmentedControl;  
      
    /**************************************** 
     Tasks 
    Initializing a Segmented Control 
     – initWithItems:   
    Managing Segment Content 
     – setImage:forSegmentAtIndex:   
     – imageForSegmentAtIndex:   
     – setTitle:forSegmentAtIndex:   
     – titleForSegmentAtIndex:   
    Managing Segments 
     – insertSegmentWithImage:atIndex:animated:   
     – insertSegmentWithTitle:atIndex:animated:   
     numberOfSegments  property   
     – removeAllSegments   
     – removeSegmentAtIndex:animated:   
     selectedSegmentIndex  property   
    Managing Segment Behavior and Appearance 
     momentary  property   
     segmentedControlStyle  property   
     tintColor  property   
     – setEnabled:forSegmentAtIndex:   
     – isEnabledForSegmentAtIndex:   
     – setContentOffset:forSegmentAtIndex:   
     – contentOffsetForSegmentAtIndex:   
     – setWidth:forSegmentAtIndex:   
     – widthForSegmentAtIndex:   
    *********************************************/  
    // Implement viewDidLoad to do additional setup after loading the view, typically from a nib.  
    - (void)viewDidLoad {  
        NSArray *segmentedArray = [[NSArray alloc]initWithObjects:@"1",@"2",@"3",@"4",nil];  
        //初始化UISegmentedControl  
        UISegmentedControl *segmentedTemp = [[UISegmentedControl alloc]initWithItems:segmentedArray];  
        segmentedControl = segmentedTemp;  
        segmentedControl.frame = CGRectMake(60.0, 10.0, 200.0, 50.0);  
          
        [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);  
          
        [self.view addSubview:widthForSegmentAtIndex];  
        [self.view addSubview:numberOfSegments];  
        [self.view addSubview:titleForSegmentAtIndex];  
        [self.view addSubview:imageForSegmentAtIndex];  
        [self.view addSubview:segmentedControl];  
          
        [widthForSegmentAtIndex release];  
        [numberOfSegments release];  
        [titleForSegmentAtIndex release];  
        [segmentedTemp release];  
        [imageForSegmentAtIndex release];  
          
        //移除所有选项  
        //[segmentedControl removeAllSegments];  
        [super viewDidLoad];  
    }  
      
    /* 
    // Override to allow orientations other than the default portrait orientation. 
    - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { 
        // Return YES for supported orientations 
        return (interfaceOrientation == UIInterfaceOrientationPortrait); 
    } 
    */  
    - (void)didReceiveMemoryWarning {  
        // Releases the view if it doesn't have a superview.  
        [super didReceiveMemoryWarning];  
          
        // Release any cached data, images, etc that aren't in use.  
    }  
    - (void)viewDidUnload {  
        // Release any retained subviews of the main view.  
        // e.g. self.myOutlet = nil;  
    }  
      
    - (void)dealloc {  
        [segmentedControl release];  
        [super dealloc];  
    }  
    @end