开发小技巧(持续更新)

从URL中提取参数为字典：

+ (NSDictionary *)_parameterWithURL:(NSURL *)url {
    NSMutableDictionary *params = [[NSMutableDictionary alloc]init];
    NSURLComponents *urlComponents = [[NSURLComponents alloc] initWithString:url.absoluteString];
    [urlComponents.queryItems enumerateObjectsUsingBlock:^(NSURLQueryItem * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
        [params setObject:obj.value forKey:obj.name];
    }];
    return params;
}