自己封装的网络请求

摘要: 自己封装的一个网络请求类,调用方便,用着顺手

#import <Foundation/Foundation.h>

//定义枚举
typedef NS_ENUM(NSInteger){
LDT_GET,
LDT_POST
}URLRequestMethod;

//定义返回值block网络请求结果
typedef void(^ResultBlock)(NSData *data,NSURLResponse *response,NSError *error);

@interface LDTNetWorkRequestManager : NSObject

///请求方法
+ (void)requestURL:(NSURL*)url Method:(URLRequestMethod)method Params:(NSDictionary *)params Result:(ResultBlock)resultBlock;

@end

#import "LDTNetWorkRequestManager.h"

@interface LDTNetWorkRequestManager ()

//存储回调block的属性
//@property(nonatomic,copy)ResultBlock block;

@end

@implementation LDTNetWorkRequestManager

//请求方法
+ (void)requestURL:(NSURL *)url Method:(URLRequestMethod)method Params:(NSDictionary *)params Result:(ResultBlock)resultBlock
{
///空的可变字符串
NSMutableString *urlString = [NSMutableString new];
//isKindOfClass来确定一个对象是否是一个类的成员，或者是派生自该类的成员
if ([url isKindOfClass:[NSURL class]]) {
//拼接url
[urlString appendString:url.absoluteString];

}else if ([url isKindOfClass:[NSString class]]){

[urlString appendString:(NSString *)url];
}
if (urlString.length ==0) {
NSError *error = [NSError errorWithDomain:@"EPA" code:3.1415926 userInfo:@{@"reason":@"你输入的网址不正确"}];
resultBlock(nil,nil,error);
return;
}
//把参数字典转换为字符串
LDTNetWorkRequestManager *manager = [LDTNetWorkRequestManager new];

NSString *paraStr = [manager strFromDict:params];

switch (method) {
case LDT_GET:
{
if (paraStr.length > 0) {

[urlString appendFormat:@"?%@",paraStr];
}
[manager requestURL:[NSURL URLWithString:urlString] ResultBlock:resultBlock];

}
break;

case LDT_POST:
[manager postURL:urlString paraStr:paraStr ResultBlock:resultBlock];
break;
default:
break;
}

}

#pragma mark - GET网络请求

- (void)requestURL:(NSURL *)url ResultBlock:(ResultBlock)block
{
NSURLSessionDataTask *task = [[NSURLSession sharedSession]dataTaskWithURL:url completionHandler:block];

//开始网络请求
[task resume];
}

#pragma mark - POST网络请求

- (void)postURL:(NSString *)urlStr paraStr:(NSString *)paraStr ResultBlock:(ResultBlock)block
{
//创建NSURL
NSURL *url = [NSURL URLWithString:urlStr];
//创建可变请求
NSMutableURLRequest *mRequest = [NSMutableURLRequest requestWithURL:url];
//设置POST方法
[mRequest setHTTPMethod:@"POST"];
//请求体
[mRequest setHTTPBody:[paraStr dataUsingEncoding:NSUTF8StringEncoding]];

NSURLSessionDataTask *dataTask = [[NSURLSession sharedSession]dataTaskWithRequest:mRequest completionHandler:block];

[dataTask resume];

}

- (NSString *)strFromDict:(NSDictionary *)dict
{
//空数组
NSMutableArray *array = [NSMutableArray new];
for (NSString *key in dict) {
NSString *str = [NSString stringWithFormat:@"%@ = %@",key,dict[key]];
[array addObject:str];
}
//数组拼接字符串
NSString *para = [array componentsJoinedByString:@"&"];
NSLog(@"%@",para);
//返回
return para;
}

@end