iOS改变UIAlertView、UIActionSheet、UIAlertController系统字体颜色

废话不多说，直接上代码，效果是最好的说服力

1、改变UIAlertView字体颜色

[UIView appearance].tintColor = [UIColor greenColor];

个人还是比较喜欢使用UIAlertView，简单粗暴达到想要的效果

2、改变UIActionSheet字体颜色

// 改变 actionSheet字体颜色

- (void)willPresentActionSheet:(UIActionSheet *)actionSheet {

SEL selector = NSSelectorFromString(@"_alertController");

if ([actionSheet respondsToSelector:selector])//ios8

{

UIAlertController *alertController = [actionSheet valueForKey:@"_alertController"];

if ([alertController isKindOfClass:[UIAlertController class]]) {

alertController.view.tintColor = [UIColor greenColor];

}

//ios7

} else{

for( UIView * subView in actionSheet.subviews ) {

if( [subView isKindOfClass:[UIButton class]] ) {

UIButton * btn = (UIButton*)subView;

[btn setTitleColor:[UIColor grayColor] forState:UIControlStateNormal];

}

}

}

}

3、改变UIAlertController字体颜色

- (void)buttonClick:(UIButton *)sender {

UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"提示" message:@"提示内容" preferredStyle:UIAlertControllerStyleAlert];

//修改标题的内容，字号，颜色。使用的key值是“attributedTitle”

NSMutableAttributedString *hogan = [[NSMutableAttributedString alloc] initWithString:@"heihei"];

[hogan addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:50] range:NSMakeRange(0, [[hogan string] length])];

[hogan addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:NSMakeRange(0, [[hogan string] length])];

[alertController setValue:hogan forKey:@"attributedTitle"];

//修改按钮的颜色，同上可以使用同样的方法修改内容，样式

UIAlertAction *defaultAction = [UIAlertAction actionWithTitle:@"Default" style:UIAlertActionStyleDefault handler:nil];

[defaultAction setValue:[UIColor blueColor] forKey:@"_titleTextColor"];

UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleCancel handler:nil];

[cancelAction setValue:[UIColor greenColor] forKey:@"_titleTextColor"];

[alertController addAction:defaultAction];

[alertController addAction:cancelAction];

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

}