普通的提示框

弹出提示框，点击确定取消提示框

• (void)showError:(NSString *)errorMsg {
  // 1.弹框提醒
  // 初始化对话框
  UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"" message:errorMsg preferredStyle:UIAlertControllerStyleAlert];
  [alert addAction:[UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:nil]];
  // 弹出对话框
  [self presentViewController:alert animated:true completion:nil];
  }

调用：

[self showError:@"内容根据需求来写啊"];