这是 Swift3.0 版的 直接建一个 Swift 文件粘贴代码就可以使用了

class BaseRequest{
    class func getWithURL(_ url:String!,para:NSDictionary?,callBack:@escaping (_ data:Data?,_ error:NSError?)->Void)->Void
    {
        let session = URLSession.shared

        let urlStr = NSMutableString.init(string: url)
        if para != nil {
            urlStr.append(self.encodeUniCode(self.parasToString(para!) as NSString) as String)            
        }
        var request = URLRequest.init(url: (URL.init(string: urlStr as String))!)
        request.httpMethod = "GET"
        
        let dataTask = session.dataTask(with: request, completionHandler: { (data, response, error) in
            
            //let res:NSHTTPURLResponse = response as! NSHTTPURLResponse
            if data != nil
            {
                callBack(data,nil)
            }else
            {
                callBack(nil,(error as? NSError?)!)
            }
        }) 
        //启动请求任务
        dataTask .resume()
    }
    
    class func postWithURL(_ url:String!,para:NSDictionary?,callBack:@escaping (_ data:Data?,_ error:NSError?)->Void)->Void{
        let session = URLSession.shared
        
        let urlStr = NSMutableString.init(string: url)
        if para != nil {
            urlStr.append(self.encodeUniCode(self.parasToString(para!) as NSString) as String)
        }
        var request = URLRequest.init(url: (URL.init(string: urlStr as String))!)
        request.httpMethod = "POST"
        
        let dataTask = session.dataTask(with: request) { (data, response, error) in
            if error == nil
            {
                callBack(data,nil)
            }else
            {
                callBack(nil,error as NSError?)
            }

        }



            //session.dataTask(with: request, completionHandler: { (data, response, error) in
            
            
                   //}
        //启动请求任务
        dataTask .resume()
    }
    
    class func parasToString(_ para:NSDictionary?)->String
    {
        let paraStr = NSMutableString.init(string: "?")
        for (key,value) in para as! [String :String]
        {
            paraStr.appendFormat("%@=%@&", key,value)
        }
        if paraStr.hasSuffix("&"){
            paraStr.deleteCharacters(in: NSMakeRange(paraStr.length - 1, 1))
        }
        //将URL中的特殊字符进行转吗
//        paraStr.stringByAddingPercentEncodingWithAllowedCharacters(NSCharacterSet.URLFragmentAllowedCharacterSet())
        //移除转码
//        paraStr.stringByRemovingPercentEncoding
        return String(paraStr)
    }
    
    class func encodeUniCode(_ string:NSString)->NSString
    {
        return string.addingPercentEncoding(withAllowedCharacters: CharacterSet.urlFragmentAllowed)! as NSString
    }
}

这是 OC 版的

BaseRequest.h 文件

#import <Foundation/Foundation.h>
@interface BaseRequest : NSObject
//一个请求: 1.IP地址  2. 资源路径 资源参数(para)  3.回调(返回数据)
// GET 请求方式
+ (void)getWithURL:(NSString *)url para:(NSDictionary *)para callBack:(void(^)(NSData * data, NSError * error))callBack;
// POST 请求方式
+ (void)postWithURL:(NSString *)url para:(NSDictionary *)para callBack:(void(^)(NSData * data, NSError * error))callBack;
@end

BaseRequest.m 文件

#import "BaseRequest.h"

@implementation BaseRequest

+(void)getWithURL:(NSString *)url para:(NSDictionary *)para callBack:(void (^)(NSData *, NSError *))callBack{
    //处理url 和 para 的拼接
    NSMutableString * urlStr = [[NSMutableString alloc]initWithString:url];
    // 拼接资源参数部分
    [urlStr appendString:[self paraToString:para]];
    NSURL * URL = [NSURL URLWithString:urlStr];
    // 创建请求对象
    NSMutableURLRequest * request = [NSMutableURLRequest requestWithURL:URL];
    request.timeoutInterval = 20;
    request.HTTPMethod = @"GET";
    // 创建session
    NSURLSession * session = [NSURLSession sharedSession];
    // 创建task
    NSURLSessionDataTask * task = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
        // 请求结束以后的回调block
        callBack(data,error);
    }];
    // 启动任务
    [task resume];
}

+(void)postWithURL:(NSString *)url para:(NSDictionary *)para callBack:(void (^)(NSData *, NSError *))callBack{
    //处理url 和 para 的拼接
    NSMutableString * urlStr = [[NSMutableString alloc]initWithString:url];
    // 拼接资源参数部分
    [urlStr appendString:[self paraToString:para]];

    NSURL * URL = [NSURL URLWithString:urlStr];
    // 创建请求对象
    NSMutableURLRequest * request = [NSMutableURLRequest requestWithURL:URL];
    request.timeoutInterval = 20;
    request.HTTPMethod = @"POST";
    // 创建session
    NSURLSession * session = [NSURLSession sharedSession];
    // 创建task
    NSURLSessionDataTask * task = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
        // 请求结束以后的回调block
        callBack(data,error);
    }];
    // 启动任务
    [task resume];

}

// 将para 拼接成 key1=value1&key2=value2&...的形式
+ (NSString *)paraToString:(NSDictionary *)para{
    NSMutableString * paraStr = [[NSMutableString alloc]initWithString:@"?"];// 资源参数部分以 ? 开头
    if (para && para.allKeys.count > 0) { // 字典不为nil, 且有键值对才进行拼接
        for (NSString * key in para.allKeys) {
            [paraStr appendFormat:@"%@=%@&",key,para[key]]; // 拼接键值对
        }
    }
    // 如果有多余的连接符& 要删除
    if ([paraStr hasSuffix:@"&"]) {
        // 删除字符串最后一个字符
        [paraStr deleteCharactersInRange:NSMakeRange(paraStr.length - 1, 1)];
    }
    // 如果参数中有中文或 "{"  "}" "*" 等特殊字符时,应该进行Unicode编码,否则请求会得不到数据

    NSString * pStr = [paraStr stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLFragmentAllowedCharacterSet]];
    // 解码
//    [pStr stringByRemovingPercentEncoding];
    return pStr;
}
@end