UI基础_UIAlertController/UIAlertView使用和字体大小颜色

UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:nil message:NSLocalizedString(@"请核对后重新输入",nil) delegate:self cancelButtonTitle:NSLocalizedString(@"知道了",nil) otherButtonTitles:nil, nil];
[alertView show];

NSString *message = NSLocalizedString(@"请核对后重新输入",nil);
NSString *title = @"提示";
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:title message:message preferredStyle:UIAlertControllerStyleAlert];
//改变title的大小和颜色
NSMutableAttributedString *titleAtt = [[NSMutableAttributedString alloc] initWithString:title];
[titleAtt addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:16] range:NSMakeRange(0, title.length)];
[titleAtt addAttribute:NSForegroundColorAttributeName value:[UIColor orangeColor] range:NSMakeRange(0, title.length)];
[alertController setValue:titleAtt forKey:@"attributedTitle"];
//改变message的大小和颜色
NSMutableAttributedString *messageAtt = [[NSMutableAttributedString alloc] initWithString:message];
[messageAtt addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:13] range:NSMakeRange(0, message.length)];
[messageAtt addAttribute:NSForegroundColorAttributeName value:[UIColor darkTextColor] range:NSMakeRange(0, message.length)];
[alertController setValue:messageAtt forKey:@"attributedMessage"];

UIAlertAction *alertAction = [UIAlertAction actionWithTitle:NSLocalizedString(@"知道了",nil) style:UIAlertActionStyleCancel handler:nil];
[alertController addAction:alertAction];
[self presentViewController:alertController animated:YES completion:nil];

title = @ ""

@"titleTextColor"

unsigned int count = 0;
Ivar *ivars = class_copyIvarList([UIAlertController class], &count);
for (int i = 0; i<count; i++) {
Ivar ivar = ivars[i];
NSLog(@"%s------%s", ivar_getName(ivar),ivar_getTypeEncoding(ivar));
}