AttributedString之入門

// 建立可變屬性化字元串
    const CGFloat fontSize = 20.0;
    NSMutableAttributedString *attrString =
    [[NSMutableAttributedString alloc] initWithString:string];
    NSInteger length = [string length];
    // 設定基本字型
    UIFont *baseFont = [UIFont systemFontOfSize:fontSize];
    [attrString addAttribute:NSFontAttributeName value:baseFont
                       range:NSMakeRange(0, length)];
    UIColor *color = [UIColor redColor];
    [attrString addAttribute:NSForegroundColorAttributeName
                       value:color
                       range:[string rangeOfString:@"surprise"]];
    //設定行之間的margin
    NSMutableParagraphStyle * pStyle = [[NSMutableParagraphStyle alloc]init];
    pStyle.minimumLineHeight = 30;
    pStyle.maximumLineHeight = 40;
    [attrString addAttribute:NSParagraphStyleAttributeName value:pStyle range:NSMakeRange(0, length)];
    // 設定下劃線-NSUnderlineStyleSingle -NSUnderlinePatternSolid 下劃線
    [attrString addAttribute:NSUnderlineStyleAttributeName value:[NSNumber numberWithInt:NSUnderlineStyleDouble] range:NSMakeRange(10, 30)];
    //NSUnderlineColorAttributeName －下劃線的顔色
    [attrString addAttribute:NSUnderlineColorAttributeName value:[UIColor blueColor] range:NSMakeRange(10, 20)];
    //NSStrokeColorAttributeName
    [attrString addAttribute:NSStrokeColorAttributeName value:[UIColor redColor] range:NSMakeRange(0, 4)];
    //NSStrokeWidthAttributeName
    [attrString addAttribute:NSStrokeWidthAttributeName value:[NSNumber numberWithInt:2] range:NSMakeRange(0, 10)];
    [attrString addAttribute:NSAttachmentAttributeName value:[[NSTextAttachment alloc] init] range:NSMakeRange(0, 10)];
    //點選文字 打開連結
    [attrString addAttribute:NSLinkAttributeName value:[NSURL URLWithString:@"http://www.baidu.com"] range:NSMakeRange(0, 4)];
    //文字的傾斜度
    [attrString addAttribute:NSObliquenessAttributeName value:[NSNumber numberWithFloat:0.5] range:NSMakeRange(length -5, 5)];
    self.textview.editable = false;//讓UITextView 不可編輯，隻可檢視。
    self.textview.attributedText = attrString;//[dict objectForKey:@"storage"];
    self.textview.scrollsToTop = YES;