光标在UITextField中闪烁，但未出现键盘 [英] Cursor is blinking in UITextField but keyboard doesn't appear

问题描述

我有一个带有文本字段的简单详细视图. 在详细的viewController中，我编写了以下代码:

I got a simple detail view with a textfield. In detail's viewController I wrote this code:

- (void) viewDidAppear:(BOOL)animated{
    [self.textField becomeFirstResponder];
    NSLog(@"is textField 1st responder %d", [self.textField isFirstResponder]);
}

当我将详细信息推送到导航控制器中时，我在日志中看到"是textField第一响应者0 ". 键盘没有出现. 但是文本字段的光标闪烁.

When I push the detail into a navigation controller, I see "is textField 1st responder 0" in my log. The keyboard doesn't appear. But the textfield has blinking cursor.

此刻会发生什么?为什么键盘没有出现?我确实尝试在AppDelegate中捕获通知"KeyboardDidShown"，但未捕获任何内容:

What happens in this moment? Why the keyboard doesn't appears? I did try to catch a notification "KeyboardDidShown" in my AppDelegate but didn't catch anything:

这是我的主视图设计:

推荐答案

调用reloadInputViews帮助吗?

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