iOS UIAlertView消失后键盘重新弹出问题

描述

最近在项目中发现一个小问题：手机当前界面有一些输入框，

• 1.点击确定按钮后->
• 2.代码隐藏键盘->
• 3.提交数据到服务端->
• 4.服务端返回结果->
• 5.弹出UIAlertView呈现结果->
• 6.用户点击UIAlertView中的按钮->
• 7.Dismiss UIAlertView->
• 8.键盘诡异的又自动弹出来了

�简单来说是过程2到过程7的时间太过短暂造成的，无语了~~~。

解决方案：

iOS8+

But since iOS 8, I suggest to use the UIAlertController instead of UIAlertView.

继续用UIAlertView

// you must put around .6 second gap in hiding keyboard and presenting alert
// 隐藏键盘后延迟0.6秒弹出UIAlertView
[YOUR_TEXT resignFirstResponder];
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(.6 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
      _alertVw = [[UIAlertView alloc] initWithTitle:@"" message:@"message." delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil];
      [_alertVw show];
});

参考 Keyboard will appeared automatically in ios 8.3 while displaying alertview or alertcontroller