如何区分分段控制器上选定的，未选定的部分

问题描述

| 我已经使用以下代码创建了分段控制器，但是我无法区分哪个被选中和哪个未被选中。我该如何区分？

UISegmentedControl *segmentedControl;
segmentedControl = [[UISegmentedControl alloc] initWithItems:nil];
                [segmentedControl insertSegmentWithTitle:@\"Male\" atIndex:0 animated:YES];
                [segmentedControl insertSegmentWithTitle:@\"Female\" atIndex:1 animated:YES];
                segmentedControl.segmentedControlStyle = UISegmentedControlStylePlain;
                segmentedControl.frame = CGRectMake(100,10,200,30);
                [segmentedControl setMomentary:YES];
                [segmentedControl addTarget:self action:@selector(segmentSwitch:) forControlEvents:UIControlEventValueChanged];



- (void)segmentSwitch:(id)sender 
{
    segmentedControl = (UISegmentedControl *) sender;
    NSInteger selectedSegment = segmentedControl.selectedSegmentIndex;
    UIView *firstView =[[UIView alloc]initWithFrame:CGRectMake(0,20,20)];
    firstView.backgroundColor=[UIColor greenColor];
    UIView *secondView =[[UIView alloc]initWithFrame:CGRectMake(0,20)];
    firstView.backgroundColor=[UIColor brownColor];
    if (selectedSegment == 0) 
    {
        NSLog(@\"first segment\");
        //toggle the correct view to be visible
        strGender =[[NSMutableString alloc]initWithString:@\"Male\"];
        [firstView setHidden:NO];
        [secondView setHidden:YES];
    }
    else
    {
        NSLog(@\"second segment\");
        //toggle the correct view to be visible
        strGender =[[NSMutableString alloc]initWithString:@\"Female\"];
        [firstView setHidden:YES];
        [secondView setHidden:NO];
    }
}

    

解决方法

UISegmentedControl *segmentedControl;

segmentedControl = [[UISegmentedControl alloc] initWithItems:nil];

segmentedControl.segmentedControlStyle = UISegmentedControlStyleBezeled;
segmentedControl.frame = CGRectMake(0,6,320,40);
segmentedControl.selectedSegmentIndex = 0;
segmentedControl.tintColor = [UIColor blackColor];
segmentedControl.backgroundColor = [UIColor blackColor];

[segmentedControl setMomentary:YES];
[segmentedControl addTarget:self action:@selector(segmentSwitch:) forControlEvents:UIControlEventValueChanged];
[self.view addSubview:segmentedControl];

//这是代码如何区分分段控制器上的选定，未选定部分

int selectedSegment = segmentedControl.selectedSegmentIndex;

if(selectedSegment == 0)
{
 // code 1
}
else if(selectedSegment == 1)
{
 // code 2
}enter code here

    ,这里有几件事。根据您对@Surjit答案的评论，如果要更改段的颜色，则必须使用ѭ3comment。对于选定和未选定状态，每个分段都需要具有图像。 但是

segmentSwitch:

方法几乎没有问题。您正在创建

firstView

和

secondView

，但未将它们添加到视图层次结构中。您要两次设置

firstView

的背景色。您可能希望打一个电话给calls6ѭ。如果没有将两个视图的“ 9”属性显示在屏幕上，那就没有意义。如果要在两个不同颜色的视图之间切换，则将它们声明为ivars并在其他地方初始化它们，然后在分段开关上切换它们的

hidden

。     ,//加载视图后，通常通过笔尖实现viewDidLoad进行其他设置。 -（void）viewDidLoad {     [super viewDidLoad];

self.view.backgroundColor = [UIColor redColor];

UISegmentedControl *segmentedControl;  // add this to your (.h) file

segmentedControl = [[UISegmentedControl alloc] initWithItems:nil];
[segmentedControl insertSegmentWithTitle:@\"Red\" atIndex:0 animated:YES];
[segmentedControl insertSegmentWithTitle:@\"Green\" atIndex:1 animated:YES];
[segmentedControl insertSegmentWithTitle:@\"Blue\" atIndex:2 animated:YES];
segmentedControl.segmentedControlStyle = UISegmentedControlStyleBezeled;
segmentedControl.frame = CGRectMake(0,40);
segmentedControl.selectedSegmentIndex = 0;
segmentedControl.tintColor = [UIColor blackColor];
segmentedControl.backgroundColor = [UIColor blackColor];
[segmentedControl setMomentary:NO];   // imp property (change it & see magic)

[segmentedControl addTarget:self action:@selector(segmentSwitch:) forControlEvents:UIControlEventValueChanged];
[self.view addSubview:segmentedControl];

} （IBAction）segmentSwitch：（id）发送者{ NSInteger selectedSegment = segmentedControl.selectedSegmentIndex; 如果（selectedSegment == 0）     self.view.backgroundColor = [UIColor blueColor]; 否则（selectedSegment == 1）     self.view.backgroundColor = [UIColor greenColor]; 否则，如果（selectedSegment == 2）     self.view.backgroundColor = [UIColor redColor]; } 只需复制并粘贴此代码。     ,

see this example here i am setting tint color for selected
and unselected segment index.

But before that please unchecked the momentary state from xib 
for UISegmentedControl.


- (void)segmentAction:(id)sender{
UIColor *tintcolor1=[UIColor colorWithRed:204/255.0 green:204/255.0 blue:204/255.0 alpha:1.0];
UIColor *tintcolor2=[UIColor colorWithRed:211/255.0 green:78/255.0 blue:65/255.0 alpha:1.0];

for (int i=0; i<[segment_controller.subviews count]; i++) 
{

    if ([[segment_controller.subviews objectAtIndex:i]isSelected] ) 
    {               

        [[segment_controller.subviews objectAtIndex:i] setTintColor:tintcolor2];
    }else
    {

        [[segment_controller.subviews objectAtIndex:i] setTintColor:tintcolor1];
    }


}