我在NSMatrix中显示按钮。
我的要求是:
更改按钮标题的颜色和 当满足某些条件时,在标题的开头放置图像。
为此,我使用了以下代码:
// setting attributed text
NSAttributedString *selectedCellAttribute;
NSFont *selectedCellFont = [NSFont fontWithName:@"Lucida Grande" size:11];
NSColor *selectedCellColor = [NSColor redColor];
NSMutableParagraphStyle *style = [[NSParagraphStyle defaultParagraphStyle] mutableCopy];
[style setAlignment:NSCenterTextAlignment];
// setting image
NSTextAttachment *imageAttachment = [[NSTextAttachment alloc] init];
NSCell *cell = [imageAttachment attachmentCell];
[cell setImage:[NSImage imageNamed:@"caution_small.png"]];
NSDictionary *selectedCellDictionary = [NSDictionary dictionaryWithObjectsAndKeys:imageAttachment,NSAttachmentAttributeName,selectedCellFont,NSFontAttributeName,selectedCellColor,NSForegroundColorAttributeName,style,NSParagraphStyleAttributeName,nil];
// recognizing cell
NSButtonCell *associatedCell = [associatesMatrix cellAtRow:0 column:2];
selectedCellAttribute = [[NSAttributedString alloc] initWithString:[associatedCell title] attributes:selectedCellDictionary];
[associatedCell setAttributedTitle:selectedCellAttribute];
虽然上面的代码显示了标题颜色的变化,但是在标题的开头没有显示任何图像:(
有人可以建议我可能出错的地方或其他方法来实现我的要求吗?
编辑:
在线:
NSCell *cell = [imageAttachment attachmentCell];
编译时会发出此警告:
type 'id <NSTextAttachmentCell>' does not conform to 'NSCopying" protocol.
谢谢,
Miraaj
答案 0 :(得分:1)
您已为整个字符串设置附件。您需要做的是在字符串前加NSAttachmentCharacter
,并仅为字符串的该部分设置附件。
您可能希望在NSAttachmentCharacter
和实际文字之间加一个空格。只有NSAttachmentCharacter
应具有附件属性。