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:@"男" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {

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

}];

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

[_button setTitle:@"女" 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];

}