使用的三方框架:pod 'AFNetworking', '~> 3.0'
继承AFHTTPSessionManager的类
官方注释:(英文很重要!!!)
## Subclassing Notes
Developers targeting iOS 7 or Mac OS X 10.9 or later that deal extensively with a web service are encouraged to subclass `AFHTTPSessionManager`, providing a class method that returns a shared singleton object on which authentication and other configuration can be shared across the application.
For developers targeting iOS 6 or Mac OS X 10.8 or earlier, `AFHTTPRequestOperationManager` may be used to similar effect.
h文件
// Created by Mac on 2017/8/29.
// Copyright © 2017年 Mac. All rights reserved.
//
#import <AFNetworking/AFNetworking.h>
@interface WJNetworkTools : AFHTTPSessionManager
+ (instancetype)sharedManager;
@end
m文件
// Created by Mac on 2017/8/29.
// Copyright © 2017年 Mac. All rights reserved.
//
#import "WJNetworkTools.h"
@implementation WJNetworkTools
+ (instancetype)sharedManager{
static id instance = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
NSURL * baseURL = [NSURL URLWithString:@"https://abcdefg1234567/index/"];
NSURLSessionConfiguration * config = [NSURLSessionConfiguration defaultSessionConfiguration];
//配置超时时长
config.timeoutIntervalForRequest = 15;
instance = [[self alloc]initWithBaseURL: baseURL sessionConfiguration:config];
});
return instance;
}
@end
JSON数据结构:
Jietu20170829-171833.png
创建数据模型:
h文件
// Created by Mac on 2017/8/29.
// Copyright © 2017年 Mac. All rights reserved.
//
#import <Foundation/Foundation.h>
@interface WJModel : NSObject
@property (nonatomic,copy)NSString * title;
@property (nonatomic,copy)NSString * describe;
+ (instancetype)wangjieWithDic:(NSDictionary *)dic;
//发送异步请求,获取数据,字典转模型
+ (void)wangjie:(void(^)(NSArray * array))success error:(void(^)())error;
@end
m文件
// Created by Mac on 2017/8/29.
// Copyright © 2017年 Mac. All rights reserved.
//
#import "WJModel.h"
#import "WJNetworkTools.h"
@implementation WJModel
+ (instancetype)wangjieWithDic:(NSDictionary *)dic{
WJModel * model = [self new];
[model setValuesForKeysWithDictionary:dic];
return model;
}
//防止请求到的字段多于你定义的字段
- (void)setValue:(id)value forUndefinedKey:(NSString *)key{
}
//发送异步请求,获取数据,字典转模型
+ (void)wangjie:(void(^)(NSArray * array))success error:(void(^)())error{
[[WJNetworkTools sharedManager] GET:@"new_list.php?os=0&index=news&limit=1&token=4f09ef8d44138f3c5e4b215a783d47dd" parameters:nil progress:nil success:^(NSURLSessionDataTask * _Nonnull task, NSDictionary * responseObject) {
NSLog(@"请求成功");
//获取返回的数组
//获取字典的第一个键
//NSString * rootKey = responseObject.keyEnumerator.nextObject;
NSArray * array = responseObject[@"data"];
//字典转模型
NSMutableArray * mArray = [NSMutableArray arrayWithCapacity:4];
[array enumerateObjectsUsingBlock:^(id _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
WJModel * model = [self wangjieWithDic:obj];
[mArray addObject:model];
}];
if (success) {
success(mArray.copy);
}
} failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull err) {
NSLog(@"请求失败%@",error);
if (error) {
error();
}
}];
}
//重写系统description(有的重写系统方法需要 super ,有的不需要,系统默认super要super,没有super的就不super)
-(NSString *)description{
return [NSString stringWithFormat:@"%@{name:%@,age:%@}",[super description],self.title,self.describe];
}
ViewController调用
// Created by Mac on 2017/8/29.
// Copyright © 2017年 Mac. All rights reserved.
//
#import "ViewController.h"
#import "WJModel.h"
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
[WJModel wangjie:^(NSArray *array) {
NSLog(@"array--%@",array);
} error:^{
}];
}
