NSTextField/NSTextView中显示超链接以及NSMutableAttributedString用法

扩展NSAttributedString

简单的实现方法是为NSAttributedString 添加一个category。

然后为此category添加额外的方法。

具体实现如下：

[代码]c#/cpp/oc代码：

@interface NSAttributedString (Hyperlink)

    +(id)hyperlinkFromString:(NSString*)inString withURL:(NSURL*)aURL;

@end

@implementation NSAttributedString (Hyperlink)

+(id)hyperlinkFromString:(NSString*)inString withURL:(NSURL*)aURL

{

    NSMutableAttributedString* attrString = [[NSMutableAttributedString alloc] initWithString: inString];

    NSRange range = NSMakeRange(0, [attrString length]);

    [attrString beginEditing];

    [attrString addAttribute:NSLinkAttributeName value:[aURL absoluteString] range:range];

​    // make the text appear in bl

    [attrString addAttribute:NSForegroundColorAttributeName value:[NSColor blueColor] range:range];

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    // next make the text appear with an underline

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    [attrString addAttribute:

            NSUnderlineStyleAttributeName value:[NSNumber numberWithInt:NSSingleUnderlineStyle] range:range];

    [attrString endEditing];

    return [attrString autorelease];

}

@end

NSTextField中添加超链接

[代码]c#/cpp/oc代码：

-(void)setHyperlinkWithTextField:(NSTextField*)inTextField

{

    // both are needed, otherwise hyperlink won't accept mousedown

    [inTextField setAllowsEditingTextAttributes: YES];

    [inTextField setSelectable: YES];

    NSURL* url = [NSURL URLWithString:@\"http://www.apple.com\"];

    NSMutableAttributedString* string = [[NSMutableAttributedString alloc] init];

    [string appendAttributedString: [NSAttributedString hyperlinkFromString:@\"Apple Computer\" withURL:url]];

    // set the attributed string to the NSTextField

    [inTextField setAttributedStringValue: string];

    [string release];

}

NSTextView中添加超链接

[代码]c#/cpp/oc代码：

-(void)setHyperlinkWithTextView:(NSTextView*)inTextView

{    // create the attributed string

    NSMutableAttributedString *string = [[NSMutableAttributedString alloc] init];

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    // create the url and use it for our attributed string

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    NSURL* url = [NSURL URLWithString: @\"http://www.apple.com\"];

    [string appendAttributedString:[NSAttributedString hyperlinkFromString:@\"Apple Computer\" withURL:url]];

    // apply it to the NSTextView's text storage

    [[inTextView textStorage] setAttributedString: string];

    [string release];

}