objective-c 聚焦一个 NSTextField
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focus a NSTextField
提问by Jeena
I have a NSTextField and I want to set its content if I klick on a button and than set the cursor on this textfield at the end of the text so if someone klicks the button he could just begin to type.
我有一个 NSTextField，如果我点击一个按钮，我想设置它的内容，然后将光标设置在文本末尾的这个文本字段上，这样如果有人点击按钮，他就可以开始输入。
Until now I use [NSTextField selectText] it selects this textfield but it selects the whole text so if someone just begins to type he'd lose all the text which alread is in the textfield.
到目前为止，我使用 [NSTextField selectText] 它选择这个文本字段，但它选择整个文本，所以如果有人刚开始输入，他会丢失文本字段中已经存在的所有文本。
回答by ewcy
or even easier
甚至更容易
[yourTextField becomeFirstResponder];
回答by Jeena
Ok I found it out now :)
好的，我现在发现了:)
- (IBAction)focusInputField:(id)sender {
[textField selectText:self];
[[textField currentEditor] setSelectedRange:NSMakeRange([[textField stringValue] length], 0)];
}
and in RubyCocoa it is:
在 RubyCocoa 中，它是：
def select_input_field
@input.selectText self
range = OSX::NSRange.new(@input.stringValue.length, 0)
@input.currentEditor.setSelectedRange range
end
回答by macinjosh
You'll want to do something like this:
你会想要做这样的事情：
[[self window] makeFirstResponder:[self yourTextField]];
回答by Antwan van Houdt
I am writing an ingame plugini, I were having a similar problem:
我正在编写一个游戏插件，我遇到了类似的问题：
- (void)gotEvent:(NSEvent *)newEvent
{
[mainWindow makeKeyAndOrderFront:self];
[mainWindow makeFirstResponder:messageField];
[mainWindow sendEvent:newEvent]; // will forward the typing event
}
this does the job :)
这可以完成工作:)
回答by vasylz
Some time ago I did similar task. My solution was write down small category method for partial text selection for NSTextField. This method does job like original selectText: does (with setting focus to control).
前段时间我做了类似的任务。我的解决方案是写下 NSTextField 部分文本选择的小类别方法。这个方法的工作就像原来的 selectText: 一样（设置焦点来控制）。
@implementation NSTextField( SelExt )
-(void)selectTextRange:(NSRange)range
{
NSText *textEditor = [self.window fieldEditor:YES forObject:self];
if( textEditor ){
id cell = [self selectedCell];
[cell selectWithFrame:[self bounds] inView:self
editor:textEditor delegate:self
start:range.location length:range.length];
}
}
@end
with this method you may place text selection where you want and start typing right after that.
使用此方法，您可以将文本选择放在您想要的位置，然后立即开始输入。
