iOS 修改alertViewController弹框的字体颜色及字体的方法
系统默认的字体是黑色，按钮颜色是蓝色或者红色的，我们怎样自定义字体呢
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UIAlertController*alertVC=[UIAlertControlleralertControllerWithTitle:@"提示"message:@"确认退出登录？"preferredStyle:(UIAlertControllerStyleAlert)];
UIAlertAction*cancelAction=[UIAlertActionactionWithTitle:@"取消"style:UIAlertActionStyleCancelhandler:^(UIAlertAction*_Nonnullaction){
NSLog(@"点击了Cancel");
[alertVCdismissViewControllerAnimated:YEScompletion:nil];
}];
UIAlertAction*okAction=[UIAlertActionactionWithTitle:@"确定"style:UIAlertActionStyleDefaulthandler:^(UIAlertAction*_Nonnullaction){
NSLog(@"点击了OK");
[[NSUserDefaultsstandardUserDefaults]setObject:nilforKey:kLoginUserKey];
[alertVCdismissViewControllerAnimated:YEScompletion:nil];
}];
//修改title
NSMutableAttributedString*alertControllerStr=[[NSMutableAttributedStringalloc]initWithString:@"提示"];
[alertControllerStraddAttribute:NSForegroundColorAttributeNamevalue:kMainTextColorrange:NSMakeRange(0,2)];
[alertControllerStraddAttribute:NSFontAttributeNamevalue:[UIFontsystemFontOfSize:15]range:NSMakeRange(0,2)];
[alertVCsetValue:alertControllerStrforKey:@"attributedTitle"];
//修改message
NSMutableAttributedString*alertControllerMessageStr=[[NSMutableAttributedStringalloc]initWithString:@"确认退出登录？"];
[alertControllerMessageStraddAttribute:NSForegroundColorAttributeNamevalue:kSubTextColorrange:NSRangeFromString(@"确认退出登录？")];
[alertControllerMessageStraddAttribute:NSFontAttributeNamevalue:[UIFontsystemFontOfSize:13]range:NSRangeFromString(@"确认退出登录？")];
[alertVCsetValue:alertControllerMessageStrforKey:@"attributedMessage"];
//修改按钮字体颜色
[cancelActionsetValue:kGreenColorforKey:@"titleTextColor"];
[okActionsetValue:kGreenColorforKey:@"titleTextColor"];
[alertVCaddAction:cancelAction];
[alertVCaddAction:okAction];
[selfpresentViewController:alertVCanimated:YEScompletion:nil];
这里的kGreenColor等是我自定义的颜色，换成自己的字体颜色即可
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