警告框

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

UIAlertAction *destructiveAction = [UIAlertAction actionWithTitle:@"删除" style:UIAlertActionStyleDestructive handler:nil];
UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil];

[alertController addAction:destructiveAction];
[alertController addAction:cancelAction];

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

//修改title
NSMutableAttributedString *alertControllerStr = [[NSMutableAttributedString alloc] initWithString:@"提示"];
[alertControllerStr addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:NSMakeRange(0, 2)];
[alertControllerStr addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:17] range:NSMakeRange(0, 2)];
[alertController setValue:alertControllerStr forKey:@"attributedTitle"];

//修改message
NSMutableAttributedString *alertControllerMessageStr = [[NSMutableAttributedString alloc] initWithString:@"提示内容"];
[alertControllerMessageStr addAttribute:NSForegroundColorAttributeName value:[UIColor greenColor] range:NSMakeRange(0, 4)];
[alertControllerMessageStr addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:20] range:NSMakeRange(0, 4)];
[alertController setValue:alertControllerMessageStr forKey:@"attributedMessage"];

作者：PlutoMa
链接：http://www.jianshu.com/p/51949eec2e9c
來源：
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