如何在iOS 5.0中使用屬性字符串作爲導航欄標題？

Question

有什麼辦法可以在iOS 5的導航欄上使用歸屬標籤？我知道它適用於iOS 6+，但在此之前？
我想在那裏使用粗體字體和非粗體字體。

Answer 1

這裏是一個幫助過我的代碼：

// 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; 

Answer 2

您可以使用TTAttributedLabel來實現此目的。這是執行這個技巧的代碼。假設您想將標題設置爲「樣本NavBarTitle」，其中樣本應該爲粗體。

//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; 

這就是全部。