网络请求
#import <Foundation/Foundation.h>
typedef void(^Finish)(NSData *data);//请求成功
typedef void(^Error)(NSError *error);//请求失败
typedef NS_ENUM(NSInteger, RequestType) {
RequestTypePOST,
RequestTypeGET
};
@interface ZPRequestManager : NSObject
//属性保存外界传过来的Block
@property (nonatomic, copy) Finish finish;
@property (nonatomic, copy) Error error;
//网络请求类
//给这个类一个网址、参数、请求方式 让这个类返回数据（NSData）
//1、属性 2、方法(给这个类东西)
//1、Block 2、代理 3、方法返回值(暂不适用)（让这个类返回东西）
+ (void)requestWithUrl:(NSString *)urlSting requestType:(RequestType)requestType parDic:(NSDictionary *)parDic finish:(Finish)finish error:(Error)error;
@end
#import "ZPRequestManager.h"
@implementation ZPRequestManager
+ (void)requestWithUrl:(NSString *)urlSting requestType:(RequestType)requestType parDic:(NSDictionary *)parDic finish:(Finish)finish error:(Error)error{
ZPRequestManager *request = [[ZPRequestManager alloc] init];
[request requestWithUrl:urlSting requestType:requestType parDic:parDic finish:finish error:error];
}
- (void)requestWithUrl:(NSString *)urlSting requestType:(RequestType)requestType parDic:(NSDictionary *)parDic finish:(Finish)finish error:(Error)error{
self.finish = finish;
self.error = error;
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:urlSting]];
if (requestType == RequestTypePOST) {
[request setHTTPMethod:@"POST"];
if (parDic.count != 0) {
[request setHTTPBody:[self dicToDataWithDic:parDic]];
}
}
NSURLSession *session = [NSURLSession sharedSession];
NSURLSessionDataTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
if (error) {
self.error(error);
} else {
dispatch_async(dispatch_get_main_queue(), ^{
self.finish(data);
});
}
}];
[task resume];
}
- (NSData *)dicToDataWithDic:(NSDictionary *)dic{
//把字典里的简直对按照 Key＝Value 拼接成字符串，最后用&符号连接所有拼接好的字符串
NSMutableArray *array = [NSMutableArray array];
for (NSString *key in dic) {
NSString *string = [NSString stringWithFormat:@"%@=%@", key, dic[key]];
[array addObject:string];
}
NSString *dataString = [array componentsJoinedByString:@"&"];
return [dataString dataUsingEncoding:NSUTF8StringEncoding];
}
@end
