ios - UISegmentedControl 在解散后更改色调颜色

Question

我的 Controller 上有 UISegmentedControl。当我第一次打开它时，哪种色调效果很好。但是在按下后退按钮时，我将关闭 Controller 。当重新打开同一个 Controller 时，UISegmentedControl 的色调会消失。请帮忙。提前致谢。

headerSegment = [[UISegmentedControl alloc] initWithItems:segmentItemsArray];
headerSegment.selectedSegmentIndex = 0;
headerSegment.apportionsSegmentWidthsByContent = YES;
headerSegment.layer.borderWidth = 0;
headerSegment.layer.masksToBounds = NO;

UIFont *font = [UIFont systemFontOfSize:16];
NSDictionary *attributes = [NSDictionary dictionaryWithObject:font
                                                       forKey:NSFontAttributeName];
[headerSegment setTitleTextAttributes:attributes
                             forState:UIControlStateNormal];

[[UISegmentedControl appearance] setTitleTextAttributes:@{NSForegroundColorAttributeName : [ApplicationColors skyBlueColor], NSFontAttributeName : [UIFont systemFontOfSize:16]} forState:UIControlStateSelected];

[[UISegmentedControl appearance] setTitleTextAttributes:@{NSForegroundColorAttributeName : [ApplicationColors segmentNormalColor], NSFontAttributeName : [UIFont systemFontOfSize:16]} forState:UIControlStateNormal];

headerSegment.layer.borderColor = [UIColor clearColor].CGColor;
headerSegment.tintColor = [UIColor whiteColor];
headerSegment.backgroundColor = [ApplicationColors lightGrayBackgroundColor ];
headerSegment.translatesAutoresizingMaskIntoConstraints = NO;
[headerSegment addTarget:self action:@selector(segmentChanged:) forControlEvents:UIControlEventValueChanged];

[contentHolderView addSubview:headerSegment];

Answer 1

尝试使用以下代码，(它对我有用)

//  ViewController.m

#import "ViewController.h"

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

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    [self addsegmentcontrol];
}


-(void)addsegmentcontrol{


    headerSegment = [[UISegmentedControl alloc] initWithItems:@[@"One", @"Two", @"Three"]];
    headerSegment.selectedSegmentIndex = 0;
    headerSegment.apportionsSegmentWidthsByContent = YES;
    headerSegment.layer.borderWidth = 0;
    headerSegment.layer.masksToBounds = NO;

    UIFont *font = [UIFont systemFontOfSize:16];
    NSDictionary *attributes = [NSDictionary dictionaryWithObject:font
                                                           forKey:NSFontAttributeName];
    [headerSegment setTitleTextAttributes:attributes
                                 forState:UIControlStateNormal];

    [headerSegment setTitleTextAttributes:@{NSForegroundColorAttributeName : [UIColor greenColor], NSFontAttributeName : [UIFont systemFontOfSize:16]} forState:UIControlStateSelected];

    [headerSegment setTitleTextAttributes:@{NSForegroundColorAttributeName : [UIColor redColor], NSFontAttributeName : [UIFont systemFontOfSize:16]} forState:UIControlStateNormal];


    headerSegment.layer.borderColor = [UIColor clearColor].CGColor;
    headerSegment.tintColor = [UIColor whiteColor];
    headerSegment.backgroundColor = [UIColor lightGrayColor];
    headerSegment.translatesAutoresizingMaskIntoConstraints = YES;
    //[headerSegment addTarget:self action:@selector(segmentChanged:) forControlEvents:UIControlEventValueChanged];

    [self.view addSubview:headerSegment];
     headerSegment.frame = CGRectMake(0, 200, 320, 44);
    [self.view layoutIfNeeded];
}

这是示例结果: