我一直试图强调悬停NSTextField。我在第一次尝试时发生的事情是文本有下划线,但它在前一篇文章的基础上。通过另一次尝试,它变得越来越大胆。
-(void)mouseEntered:(NSEvent *)theEvent {
if (is_underlined)
return;
is_underlined = YES;
//NSDictionary *attrsDictionary = [NSDictionary dictionaryWithObject:[NSNumber numberWithInt:NSUnderlineStyleSingle] forKey:NSUnderlineStyleAttributeName];
//NSMutableAttributedString * as = [[NSMutableAttributedString alloc] initWithString:self.event.label
// attributes:attrsDictionary];
//[as autorelease];
NSMutableAttributedString * as = [[[self attributedStringValue] mutableCopy] autorelease];
[as beginEditing];
[as addAttribute:NSUnderlineStyleAttributeName
value:[NSNumber numberWithInt:NSUnderlineStyleSingle]
range:[[[self window] fieldEditor:YES forObject:self] selectedRange]];
[as endEditing];
[self setAttributedStringValue:as];
}
-(void)mouseExited:(NSEvent *)theEvent {
if (!is_underlined)
return;
is_underlined = NO;
// self.stringValue = self.event.label;
//[self setAttributedStringValue:nil];
NSMutableAttributedString * as = [[[self attributedStringValue] mutableCopy] autorelease];
[as beginEditing];
[as removeAttribute:NSUnderlineStyleAttributeName range:[[[self window] fieldEditor:YES forObject:self] selectedRange]];
// [as addAttribute:NSUnderlineStyleAttributeName
// value:[NSNumber numberWithInt:0]
// range:[[[self window] fieldEditor:YES forObject:self] selectedRange]];
[as endEditing];
[self setAttributedStringValue:as];
}
答案 0 :(得分:0)
我认为我找到了答案 - 它不在于代码本身,而在于代码中我正在构建的演示代码。作者在drawRect中实现了这些视图,这意味着每次绘制矩形时,都会在同一位置创建一个新的文本字段。