可可：在空格键停止从字段编辑器自动完成 [英] Cocoa: Stopping the field editor from auto-completing on space key

问题描述

我有几个的NSTextField 控制自定义视图，我想提供定制的自动补全，我已经成功地实现所有使用 NSTextFieldDelegate 协议。自动补全是全名或地名，这取决于文本字段进行编辑。

I have a custom view with several NSTextField controls for which I want to supply custom auto-completions and I have successfully implemented all that using the NSTextFieldDelegate Protocol. The auto-completions are full names or place names, depending on which text field is being edited.

问题是，自动补全，几乎总是包含空格字符，因此，如果用户键入一个匹配的建议，但并不想接受这一建议的东西，字段编辑器将接受该建议，当用户presses空格键。我想字段编辑器只能使用Tab键接受该建议。

The issue is that the auto-completions almost always contain a space character and so if the user is typing something that matches a suggestion, but doesn't want to accept that suggestion, the field editor will accept the suggestion when user presses the space key. I want the field editor to accept the suggestion using the tab key only.

据我所知，这将涉及到子类 NSTextView 来提供一个自定义字段编辑器，这是<一个href=\"https://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/TextEditing/Tasks/Subclassing.html#//apple_ref/doc/uid/20000937-CJBJHGAG\"相对=nofollow>苹果记载的作为是可以接受的方式，但它不是我清楚我需要重写哪些方法和哪些覆盖的方法需要做的，为了得到我我想要的。

I understand that this will involve subclassing NSTextView to provide a custom field editor, and this is documented by Apple as being the acceptable way, however it's not clear to me what methods I need to override and what the overridden methods need to do, in order to get me what I want.

任何人都可以表明这是如何实现的？

Can anyone suggest how this is achieved?

推荐答案

我承认我被这个问题前面摸索了一段时间，在此之前的I发现通过谷歌福可接受的答案的神奇code，从原来的回答者公然被盗：

I admit that I'd been fumbling with this question for quite some time earlier, before I discovered an acceptable answer via Google-fu. The magic code, blatantly stolen from the original answerer:

@interface MLFieldEditor : NSTextView @end

@implementation MLFieldEditor


-  (void)insertCompletion:(NSString *)word forPartialWordRange:(NSRange)charRange movement:(NSInteger)movement isFinal:(BOOL)flag {
    // suppress completion if user types a space
    if (movement == NSRightTextMovement) return;

    // show full replacements
    if (charRange.location != 0) {
        charRange.length += charRange.location;
        charRange.location = 0;
    }

    [super insertCompletion:word forPartialWordRange:charRange movement:movement isFinal:flag];

    if (movement == NSReturnTextMovement)
    {
        [[NSNotificationCenter defaultCenter] postNotificationName:MLSearchFieldAutocompleted object:self userInfo:nil];
    } }

@end

（<一个href=\"http://stackoverflow.com/questions/3981439/how-to-$p$pvent-nssearchfield-from-overwriting-entered-strings-using-the-first-au\">Additional参考）

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