- (NSString*)firstCharactor:(NSString*)aString
{
//转成了可变字符串
NSMutableString*str = [NSMutableStringstringWithString:aString];
//先转换为带声调的拼音
CFStringTransform((CFMutableStringRef)str,NULL,kCFStringTransformMandarinLatin,NO);
//再转换为不带声调的拼音
CFStringTransform((CFMutableStringRef)str,NULL,kCFStringTransformStripDiacritics,NO);
//转化为大写拼音
NSString*pinYin = [strcapitalizedString];
//获取并返回首字母
return[pinYinsubstringToIndex:1];
}
