方法1：
添加对应的字体(.ttf或.odf)到工程的resurce，使用cocos2d中的FontLabel库，FontLabel继承于UILabel，象UILabel一样使用就好了
fontName直接使用添加的资源名字即可
方法2;
1，添加对应的字体(.ttf或.odf)到工程的resurce，例如simkai.ttf
2，在info.plist中添加一项 Fonts provided by application (item0对应的value为simkai.ttf，添加多个字体依次添加就可以了)
3，使用时 aLabel.font=[UIFont fontWithName:@"XXX" size:30]; 注意XXX不一定是simkai，这里是KaiTi_GB2312(中文楷体)，你可以通过下面的方法遍历所有字体
以下是代码片段：
NSArray *familyNames = [[NSArray alloc] initWithArray:[UIFont familyNames]];
NSArray *fontNames;
NSInteger indFamily, indFont;
for (indFamily=0; indFamily<[familyNames count]; ++indFamily)
{
NSLog(@"Family name: %@", [familyNames objectAtIndex:indFamily]);
fontNames = [[NSArray alloc] initWithArray:
[UIFont fontNamesForFamilyName:
[familyNames objectAtIndex:indFamily]]];
for (indFont=0; indFont<[fontNames count]; ++indFont)
{
NSLog(@" Font name: %@", [fontNames objectAtIndex:indFont]);
}
[fontNames release];
}
[familyNames release];
其中添加的simkai.ttf对应的字体就是KaiTi_GB2312
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 120, 50)];
label.font = [UIFont fontWithName:@"KaiTi_GB2312" size:30];
label.text = @"中文楷体";
[self.view addSubview:label];
[label release];
或者
NSArray *familyNames = [UIFont familyNames];
for( NSString *familyName in familyNames ){
printf( "Family: %s \n", [familyName UTF8String] );
NSArray *fontNames = [UIFont fontNamesForFamilyName:familyName];
for( NSString *fontName in fontNames ){
printf( "\tFont: %s \n", [fontName UTF8String] );
}
}