如何以编程方式提供UITextView焦点？ [英] How do I give a UITextView focus programmatically?

问题描述

所以我想引入一个带有UITextView的模态视图控制器，我想让键盘自动弹出，UITextView有焦点。

So I want to bring in a modal view controller that has a UITextView in it and I want the keyboard to automatically popup and the UITextView have focus.

我找到了通过执行以下操作来实现此目的：

I found a way to accomplish this by doing the following:

textView.editable = YES;
textView.editable = NO;

这对我来说似乎很难看，还有另外一种方法吗？

This just seems hacky to me, is there another way?

推荐答案

由于 UITextView 继承自 UIResponder （间接地，它实际上继承自 UIScrollView ，它继承自 UIView 哪个然后继承自 UIResponder ）您可以在文本字段上调用 -becomeFirstResponder 方法，这将导致它成为第一个响应者并开始编辑：

Since UITextView inherits from UIResponder (indirectly, it actually inherits from UIScrollView, which inherits from UIView which then inherits from UIResponder) you can call the -becomeFirstResponder method on your text field, which will cause it to become the first responder and begin editing:

[textView becomeFirstResponder];

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