iOS NSString拼接字符串,NSString拼接字符串,NSString stringByAppendingString,NSString stringWithFormat,猿说编程,

iOS NSString字符串中首字母变大写,NSString字符串中首字母变大写,NSString首字母变大写,NSString capitalizedString, capitalizedString

iOS NSString将字符串中的字母转换为小写,NSString将字符串中的字母转换为小写,NSString字符串字母转小写,NSString lowercaseString,lowercaseString,

iOS NSString将字符串中的字母转换为大写,NSString将字符串中的字母转换为大写,NSString字符串中的字母转大写,NSString uppercaseString,猿说编程,

iOS NSString判断两个字符串是否相等,NSString判断两个字符串是否相等,NSString isEqualToString, isEqualToString,猿说编程,

iOS NSString匹配字符串结尾,NSString匹配字符串结尾,NSString hasSuffix,hasSuffix,猿说编程,

iOS NSString匹配字符串开头,NSString匹配字符串开头, hasPrefix,NSString hasPrefix,猿说编程,

iOS NSString获取指定下标字符,NSString获取指定下标字符,NSString substringWithRange,NSString characterAtIndex,

iOS NSString判断字符串是否为空判,NSString字符串是否为空判,NSString空字符串,NSString isEqual,

iOS NSString获取字符串长度,NSString获取字符串长度,NSString lengthOfBytesUsingEncoding, NSString length,NSString计算中文长度,