macos Cocoa：如何制作多行 NSTextField？
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Cocoa : How to make multiline NSTextField?
提问by Siarhei Fedartsou
How to make multiline NSTextField? UPDATE:I've found in IB special type of NSTextField called "Wrapped Text Field". It is multiline but when I want get a newline I have to press Ctrl+Enter. But I want to press only Enter to get a newline. How can I do it?
如何制作多行 NSTextField？更新：我在 IB 中发现了一种特殊类型的 NSTextField，称为“Wrapped Text Field”。它是多行的，但是当我想要换行时，我必须按 Ctrl+Enter。但我只想按 Enter 以获得换行符。我该怎么做？
采纳答案by Jon Steinmetz
There is no way to specify this behavior solely in Interface Builder. You can do it with a delegate message as described in this tech note QA1454.
无法单独在 Interface Builder 中指定此行为。您可以使用此技术说明QA1454 中所述的委托消息来执行此操作。
Here is the example delegate message from the tech note:
以下是技术说明中的示例委托消息：
- (BOOL)control:(NSControl*)control textView:(NSTextView*)textView doCommandBySelector:(SEL)commandSelector
{
BOOL result = NO;
if (commandSelector == @selector(insertNewline:))
{
// new line action:
// always insert a line-break character and don't cause the receiver to end editing
[textView insertNewlineIgnoringFieldEditor:self];
result = YES;
}
else if (commandSelector == @selector(insertTab:))
{
// tab action:
// always insert a tab character and don't cause the receiver to end editing
[textView insertTabIgnoringFieldEditor:self];
result = YES;
}
return result;
}
回答by Antwan van Houdt
Using NSTextView, its a multiline NSTextFieldsorta, it is a subclass of NSTextcorrect my if I am wrong. The NSTextViewhas an NSTextStorage, which is a subclass of NSAttributedString. You need to give it an NSAttributedStringobject instead of a NSStringto fill its contents as it can display colors etc.
使用NSTextView，它是一个多行NSTextField排序，NSText如果我错了，它是更正我的子类。该NSTextView具有一个NSTextStorage，这是的一个子类NSAttributedString。你需要给它一个NSAttributedString对象而不是一个NSString来填充它的内容，因为它可以显示颜色等。
[[yourTextView textStorage] setAttributedString:attrStr];
