ios - 如何在 iOS 5.0 中使用属性字符串作为导航栏标题？

Question

有没有办法在 iOS 5 的导航栏上使用属性标签？我知道它适用于 iOS 6+，但在那之前？
我想在那里同时使用粗体和非粗体字体。

Answer 1

您可以使用TTAttributedLabel来实现这一点。这是解决问题的代码。假设您要将标题设置为“Sample NavBarTitle”，其中 Sample 应为粗体。

//In your code there may be several ranges, corresponding to how many attributes you want to have
NSRange range = NSMakeRange(0, 6);
//Initialize NSMutableAttributedString
NSMutableAttributedString * string = [[NSMutableAttributedString alloc] initWithString:@"Sample NavBarTitle"];
//Set the attribute to make "Sample" bold
[string addAttribute:NSFontAttributeName value:[UIFont fontWithName:@"Georgia-Bold" size:15] range:range];
//Initialize TTAttributedLabel with rect
TTTAttributedLabel * label = [[TTTAttributedLabel alloc] initWithFrame:CGRectMake(0, 0, 20, 150)];
//Set the attributedText property of TTAttributedLabel
label.attributedText = string;
//Set navigationItem.titleView to the label view we've created
self.navigationItem.titleView = label;

就这样。

Answer 2

这是帮助我的代码：

 // Total string
    NSString *tempString = [NSString stringWithFormat:@"%@, %@ %@ %@ %@", gameName, stringConnector, self.bet.gameInfo.draw.drawNumber, stringConnector2,  [dateFormatter stringFromDate:self.bet.gameInfo.draw.date]];

    NSRange range = [tempString rangeOfString:gameName];

    NSMutableAttributedString * string2 = [[NSMutableAttributedString alloc] initWithString:tempString];

    // font for all string
    UIFont *regularFont = [UIFont fontWithName:BEAU_PRO_LIGHT_FONT_NAME size:21];
    CTFontRef font_2 = CTFontCreateWithName((__bridge CFStringRef)regularFont.fontName, regularFont.pointSize, NULL);
    [string2 addAttribute:(NSString *)kCTFontAttributeName value:(__bridge id)font_2 range:[tempString rangeOfString:tempString]];

    // bold font
    UIFont *boldFont = [UIFont fontWithName:BEAU_PRO_SEMIBOLD_FONT_NAME size:21];
    CTFontRef font_1 = CTFontCreateWithName((__bridge CFStringRef)boldFont.fontName, boldFont.pointSize, NULL);
    [string2 addAttribute:(NSString *)kCTFontAttributeName value:(__bridge id)font_1 range:range];

    TTTAttributedLabel * label = [[TTTAttributedLabel alloc] initWithFrame:CGRectMake(0, 0, 600, 20)];
    label.attributedText = string2;
    [label sizeToFit];
    self.navigationItem.titleView = label;