自动调整 NSButton 的大小以适应以编程方式更改的文本 (Xcode)
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Automatically resize an NSButton to fit programmatically changed text (Xcode)
提问by Ryan
I have an NSButton (Push Button) with some temporary title text built in Interface Builder / Xcode. Elsewhere, the title text inside the button is changed programmatically to a string of unknown length (actually, many times to many different lengths).
我有一个 NSButton（按钮），里面有一些内置在 Interface Builder/Xcode 中的临时标题文本。在其他地方，按钮内的标题文本以编程方式更改为未知长度的字符串（实际上，多次更改为许多不同的长度）。
I'd like the button to automatically be resized (with a fixed right position--so it grows out to the left) to fit whatever length of string is programmatically inserted as button text. But I can't figure it out. Any suggestions? Thanks in advance!
我希望按钮自动调整大小（具有固定的右侧位置 - 因此它向左长出）以适合以编程方式作为按钮文本插入的任何字符串长度。但我想不通。有什么建议？提前致谢！
回答by Rob Keniger
If you can't use Auto Layout as suggested by @jtbandes (it's only available in Lion), then you can call [button sizeToFit]after setting its string value, which will make the button resize to fit its string. You would then need to adjust its frame based on the new width.
如果您不能按照@jtbandes 的建议使用自动布局（它仅在 Lion 中可用），那么您可以[button sizeToFit]在设置其字符串值后调用，这将使按钮调整大小以适应其字符串。然后您需要根据新宽度调整其框架。
You can't do this automatically, but it would be easy to do in a subclass of NSButton.
您不能自动执行此操作，但在NSButton.
@implementation RKSizeToFitButton
- (void)setStringValue:(NSString*)aString
{
//get the current frame
NSRect frame = [self frame];
//button label
[super setStringValue:aString];
//resize to fit the new string
[self sizeToFit];
//calculate the difference between the two frame widths
NSSize newSize = self.frame.size;
CGFloat widthDelta = newSize.width - NSWidth(frame);
//set the frame origin
[self setFrameOrigin:NSMakePoint(NSMinX(self.frame) - widthDelta, NSMinY(self.frame))];
}
@end
This way you can just set your button's class to RKSizeToFitButtonin Interface Builder and then calling setStringValue:on the button to change its label will "just work" with no additional code.
通过这种方式，您可以RKSizeToFitButton在 Interface Builder中将按钮的类设置为，然后调用setStringValue:按钮更改其标签将“正常工作”，无需额外代码。
回答by jtbandes
Sure! Just use Auto Layout! :)
当然！只需使用自动布局！:)
