objective-c - NSTextField becomeFirstResponder 在 awakeFromNib 中不起作用

Question

我想在加载表单时设置焦点，但它在 awakeFromNib 中不起作用。

[myTextField becomeFirstResponder];

Answer 1

只是引用apple docs :

Use the NSWindow makeFirstResponder: method, not this method, to make an object the first responder. Never invoke this method directly.

改为这样做:

[[myTextField window] makeFirstResponder:myTextField];