增加 UILabel.text 中第一个字母的字体大小

Question

我希望 UILabel 的第一个字母的字体大小与其他字母不同，大一些。需要一些关于如何做到这一点的指导。标签有很多字。

这是我尝试过的：

NSArray * words = [Label.text componentsSeparatedByCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
NSString *firstLetter = [[words objectAtIndex:0] substringToIndex:1];

但被困在增加 NSString 的大小上。有没有更好的办法？欢迎提出建议和指导..谢谢..

编辑：

[Label setFont:[UIFont fontWithName:@"Arial" size:12.f]];
NSArray * words = [Label.text componentsSeparatedByCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
UIFont *fontFirst=[UIFont fontWithName:@"Arial" size:15.f];
NSDictionary *attrsDictFirst=[NSDictionary dictionaryWithObject:font forKey:NSFontAttributeName];
NSAttributedString *finalString=[[NSAttributedString alloc] initWithString:[[words objectAtIndex:0] substringToIndex:1]  attributes:attrsDictFirst];

Answer 1

例如，得到这个：

这样说：

NSString* s2 = @"Fourscore and seven years ago, our fathers brought forth "
    @"upon this continent a new nation, conceived in liberty and dedicated "
    @"to the proposition that all men are created equal.";
NSMutableAttributedString* content2 =
    [[NSMutableAttributedString alloc]
     initWithString:s2
     attributes:
         @{
           NSFontAttributeName:
               [UIFont fontWithName:@"HoeflerText-Black" size:16]
         }];
[content2 setAttributes:
    @{
      NSFontAttributeName:[UIFont fontWithName:@"HoeflerText-Black" size:24]
     } range:NSMakeRange(0,1)];
[content2 addAttributes:
    @{
      NSKernAttributeName:@-4
     } range:NSMakeRange(0,1)];

NSMutableParagraphStyle* para2 = [NSMutableParagraphStyle new];
para2.headIndent = 10;
para2.firstLineHeadIndent = 10;
para2.tailIndent = -10;
para2.lineBreakMode = NSLineBreakByWordWrapping;
para2.alignment = NSTextAlignmentJustified;
para2.lineHeightMultiple = 1.2;
para2.hyphenationFactor = 1.0;
[content2 addAttribute:NSParagraphStyleAttributeName
                 value:para2 range:NSMakeRange(0,1)];

然后将content2 分配给标签的attributedText。

Answer 2

需要使用NSAttributedString。 iOS6.0 以上

得到第一个字母后，将其放入属性字符串，更改其大小。

将其余的字符串设置为其他大小。

UIFont *font=[UIFont fontWithName:@"Arial" size:12.f];
NSDictionary *attrsDict=[NSDictionary dictionaryWithObject:font
                                forKey:NSFontAttributeName];
NSAttributedString *attribString=[[NSAttributedString alloc] initWithString:[words[0] substringFromIndex:1]  attributes:attrsDict];


UIFont *fontFirst=[UIFont fontWithName:@"Arial" size:15.f];
NSDictionary *attrsDictFirst=[NSDictionary dictionaryWithObject:font forKey:NSFontAttributeName];
NSAttributedString *firstString=[[NSAttributedString alloc] initWithString:[attribString subStringToIndex:1]  attributes:attrsDictFirst];

[attribString replaceCharactersInRange:NSMakeRange(0, 1)  withString:firstString];