IOS中URL编码和解码

int main(int argc, const char * argv[]) {
    
    NSString *str = @"白日依山尽";
    
    //编码
    NSString *encoderStr = [str stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
    
    //解码
    NSString *decoderStr = [encoderStr stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
    
    //字符串打散
    for (int i = 0; i < str.length; i++) {
        NSString *word = [str substringWithRange:NSMakeRange(i, 1)];
        NSLog(@"%@",word);
    }
    
    
    NSLog(@"%@",encoderStr);
    
    NSLog(@"%@",decoderStr);
    
    return 0;
}