如何更改NSTextView的lineSpacing？

Question

我搜索了一些页面。我发现答案代码如下......

NSMutableParagraphStyle *para = [[[NSParagraphStyle defaultParagraphStyle] mutableCopy] autorelease]; 

[para setLineSpacing:message.defaultParagraphStyle.lineSpacing + (float)2.5];

[message setDefaultParagraphStyle:(NSParagraphStyle*)para];

但它似乎没有用。这里有任何想法或错误用法吗？

Answer 1

那样做：

CGFloat spacing = 55.0f;
NSMutableParagraphStyle *para =[[[NSParagraphStyle defaultParagraphStyle] mutableCopy] autorelease];
[para setLineSpacing:spacing];
[para setMinimumLineHeight:spacing];
[para setMaximumLineHeight:spacing];
[yourTextView setDefaultParagraphStyle:para];

NSString *stringWithLineBreak = @"test \n test text \n more test text \n";
[yourTextView setString:stringWithLineBreak];