iOS获取网络数据/路径中的文件名

NSString * urlString = @"http://www.baidu.com/img/baidu_logo_fqj_10.gif";
    //方法一：最直接
    NSString * fileName = [urlString lastPathComponent];
    NSLog(@"fileName==%@",fileName);
    //方法二：根据字符或者字符串分割
    NSString * fileName2 = [[NSString alloc] init];
    NSArray * separatedArray = [[NSArray alloc] init];
    separatedArray = [urlString componentsSeparatedByString:@"/"];
    fileName2 = [separatedArray lastObject];
    NSLog(@"separatedArray==%@",separatedArray);
    NSLog(@"fileName2==%@",fileName2);
    //方法三:将链接看成是路劲
    NSArray * urlCom = [[NSArray alloc] initWithArray:[urlString pathComponents]];
    NSLog(@"[urlCom lastObject]===%@",[urlCom lastObject]);
    //方法四：NSRange.它在截取二进制文件的时候十分方便
    NSString * fileName3;
    NSRange range = [urlString rangeOfString:@"/" options:NSBackwardsSearch];//NSBackwardsSearch从字符串末尾开始检索
    if (range.location != NSNotFound) {
        fileName3 = [urlString substringFromIndex:range.location+1];
        if ([[fileName3 lowercaseString] hasSuffix:@".gif"]) {//lowercaseString 改变字母为小写 uppercaseString改变字母切大写  capitalizedString 首字母大些转换   ·
            NSLog(@"fileName3====%@",fileName3);
        }else{
        
        }
    }else{
    
    }