关于UIAlertAction如何修改sheet上的字体颜色

相信很多程序员都会遇到需求是这样的:

但是你发现无论怎么设置cancel和Destructive都无法让红色字体移动到下面取消按钮上:

其实之前一直用错,用了ios9之前的UIActionSheet这个view来当控件,但是发现,UIAlertController这个控制器用来做这个更好,只需一行代码就可以搞定。以下是我自己通过利用kvc去对字体颜色做改变的做法,希望有其他见解的可以随时交流。

- (void)viewDidLoad {

    [super viewDidLoad];

    self.button    = [[UIButton alloc]initWithFrame:CGRectMake(100, 200, 100, 50)];

    _button.backgroundColor  = [UIColor blueColor];

    [_button setTitle:@"性别" forState:UIControlStateNormal];

    [_button addTarget:self action:@selector(selectSheet) forControlEvents:UIControlEventTouchUpInside];

    [self.view addSubview:_button];

}

 

- (void)selectSheet

{

    UIAlertAction *alertAct = [UIAlertAction actionWithTitle:@"" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {

        [_button setTitle:@"" forState:UIControlStateNormal];

    }];

    UIAlertAction *alertAct1 = [UIAlertAction actionWithTitle:@"" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {

        [_button setTitle:@"" forState:UIControlStateNormal];

    }];

    UIAlertAction *alertAct2 = [UIAlertAction actionWithTitle:@"保密" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {

        [_button setTitle:@"保密" forState:UIControlStateNormal];

    }];

    UIAlertAction *alertAct3 = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {

        

    }];

    //******通过利用kvc对字体颜色进行修改 *******//

    [alertAct3 setValue:[UIColor redColor] forKey:@"_titleTextColor"];

    UIAlertController *alertControl = [UIAlertController alertControllerWithTitle:nil message:nil preferredStyle:UIAlertControllerStyleActionSheet];

    [alertControl addAction:alertAct];

    [alertControl addAction:alertAct1];

    [alertControl addAction:alertAct2];

    [alertControl addAction:alertAct3];

    [self presentViewController:alertControl animated:YES completion:nil];

}

 

posted @ 2016-10-18 14:40  文艺IT者  阅读(2235)  评论(0编辑  收藏  举报