简单封装YTKRequest

PS: 项目中使用了YTKNetWork来处理数据请求，TYK的特点就是把请求都按照request进行了封装，一个接口，一个request文件，截至到目前，已经存在近200个Request类，要疯的节奏；一方面类多了对程序也是个负担，另外开发过程中看着也难受。
因此给YTKBaseRequest封装了一个壳子，壳子写法分为一下两种
思路差不多，使用上也大同小异，先把使用方法贴一下，大家选着看一下。代码在gitee上ShellRequestForYTK

• 第一种

    SShellRequest * ssRequest = [[SShellRequest alloc]init];
    
    ssRequest.requestUrlBlock(@"/mock/route/to/shell")
    .requestArgumentBlock(@{})
    .requestMethodBlock(YTKRequestMethodGET)
    .shellSuccessblock(^(__kindof ShellAPIResponse * _Nullable response) {
        NSLog(@"SShellRequest~~~~~~~~~%@, %@", response.returnCode, response.returnData);
    })
    .shellFailureblock(^(__kindof ShellAPIResponse * _Nullable response) {
        NSLog(@"SShellRequestXXXXXXXX%@", response.returnCode);

    })
    .startBlock();

• 第二种

    ShellRequest * request = [[ShellRequest alloc] init];
    
    request.shellSuccessblock(^(__kindof ShellAPIResponse * _Nullable response) {
        NSLog(@"~~~~~~~~~%@, %@", response.returnCode, response.returnMessage);
    })
    .shellFailureblock(^(__kindof ShellAPIResponse * _Nullable response) {
        NSLog(@"XXXXXXXXXXXXXXX%@", response.returnCode);
    })
    .requestUrlBlock(^NSString * _Nullable{
        return @"/mock/route/to/shell";
    })
    .requestArgumentBlock(^id _Nullable{
        return (id)@{};
    })
    .requestMethodBlock(^YTKRequestMethod{
        return YTKRequestMethodGET;
    });
    
    request.startBlock();

第一种：壳子直接缓存属性

，壳子里根据YTK重写的一些方法，缓存了属性，使YTK调用的时候可以找到对应的属性。写法上参考了Masonry，尽量使设置属性的方法集中。
先贴使用方法

写法也是简单粗暴，

@property(nonatomic, copy, readonly)SShellRequest *_Nullable(^requestUrlBlock)(NSString *);

.m中，，
// 声明缓存
NSString * _kRequestUrl;
// 重写YTK方法
- (NSString *)requestUrl {
    return _kRequestUrl ?: @"";
}
// 设置属性方法
- (SShellRequest * _Nullable (^)(NSString * _Nonnull))requestUrlBlock {
    __weak typeof(self) weakSelf = self;
    return ^SShellRequest * _Nullable(NSString * _Nonnull url) {
        __strong typeof(weakSelf) strongSelf = weakSelf;
        strongSelf->_kRequestUrl = url;
        return weakSelf;
    };
}
// 调用start
- (ShellStartBlock)startBlock {
    __weak typeof(self) weakSelf = self;
    return ^ShellRequest * _Nullable{
        [weakSelf startWithCompletionBlockWithSuccess:^(__kindof YTKBaseRequest * _Nonnull request) {
                ShellAPIResponse* response = [[ShellAPIResponse alloc] init];
             weakSelf.successResponseBlock(response);
        } failure:^(__kindof YTKBaseRequest * _Nonnull request) {
                ShellAPIResponse* response = [[ShellAPIResponse alloc] init];
                weakSelf.failureResponseBlock(response);
        }];
        return weakSelf;
    };
}

第二种：壳子缓存了Block

，壳子里根据YTK重写的一些方法，缓存了block，使YTK调用的时候可以找到对应的属性。写法上参考了Masonry，尽量使设置属性的方法集中。

思路是，创建属性设置的block， 然后缓存起来，“属性设置的block” 也用一个block作为属性进行设置，这样就可以使用点语法。
关键代码：

//ShellAPIResponse 里面包裹了返回值，状态，和data
typedef void(^ABCAPIResponseBlock)(__kindof ShellAPIResponse * _Nullable response);
typedef ShellRequest *_Nullable(^ShellStartBlock)(void);
typedef ShellRequest *_Nullable(^ShellRequestCompletionBlock)(ABCAPIResponseBlock);

@interface ShellRequest : YTKRequest

//MARK: 用户可供调用的设置url等的block
@property(nonatomic, copy, readonly)ShellRequest *_Nullable(^requestUrlBlock)(FinalRequestUrlBlock);
@property(nonatomic, copy, readonly)ShellRequestCompletionBlock shellSuccessblock;
@property(nonatomic, copy, readonly)ShellRequestCompletionBlock shellFailureblock;
/// 开始请求的block，直接使用，并保证最后使用
@property(nonatomic, copy, readonly)ShellStartBlock startBlock;

@end

NS_ASSUME_NONNULL_END

ShellRequest.m 中关键代码如下：

@interface ShellRequest ()
{
    FinalRequestUrlBlock _kRequestUrlBlock;
}
@end

@implementation ShellRequest

- (NSString *)requestUrl{
    return _kRequestUrlBlock ? _kRequestUrlBlock() : @"";
}
// 调用start
- (ShellStartBlock)startBlock {
    __weak typeof(self) weakSelf = self;
    return ^ShellRequest * _Nullable{
        [weakSelf startWithCompletionBlockWithSuccess:^(__kindof YTKBaseRequest * _Nonnull request) {
                ShellAPIResponse* response = [[ShellAPIResponse alloc] init];
              weakSelf.failureResponseBlock(response);
             weakSelf.successResponseBlock(response);
        } failure:^(__kindof YTKBaseRequest * _Nonnull request) {
             NSInteger statusCode = request.responseStatusCode;
                ShellAPIResponse* response = [[ShellAPIResponse alloc] init];
                weakSelf.failureResponseBlock(response);
        }];
        return weakSelf;
    };
}
// 设置缓存block们
- (ShellRequest * _Nullable (^)(FinalRequestUrlBlock _Nonnull))requestUrlBlock {
    __weak typeof(self) weakSelf = self;
    return ^ShellRequest * _Nullable(FinalRequestUrlBlock urlBlock) {
        __strong typeof(weakSelf) strongSelf = weakSelf;
        strongSelf->_kRequestUrlBlock = urlBlock;
        return weakSelf;
    };
}

@end