IOS項目之網路分離

標籤：

項目使用AFNetWork把網路層這塊也放進了ViewController中,資料解析緩衝這些也在裡面，這樣階層可能不夠清楚,今天就試著分離了一下。

1.類結構

首頁主要有三個部分組成,頂部的廣告,中部的表徵圖,和下部的一些儲存格。設計了三個類,AdModel、IconModel、HomeFeedModel,參考MVVM同時設計了一個ViewModel,聲明了服務電話以及三個儲存上面類對象的數組。原以為將前面的三個類實現NSCoding協議就可以了沒想到ViewModel也要實現。

2.AFNetWorking分離

(1)遇到的問題

想著寫一個方法可以擷取請求資料的同時也能把錯誤資訊返回出來所以開始就寫了下面的代碼, 運行發現msg、errmsg都是空,斷點之後發現AFNetWork請求部分是非同步,return之前還沒有給msg賦值,讓我很是糾結, 這樣就沒有傳回值。另block中修改外部變數要加__block

 

 

(2)解決

由於上面出現的問題，兩個類的傳值還是有問題,屬於有多個傳回值，問了下小夥伴,說結構有問題，需要用代理或者block，於是我又加了一個block，這下試了是可以的 @Class前置聲明

#import <Foundation/Foundation.h>@class HomeModel;typedef void(^homeModelBlock) (HomeModel *model,NSString *errmsg);@interface HomeModel : NSObject@property(nonatomic,strong) NSString *telPhone;@property(nonatomic,strong) NSMutableArray *adList;@property(nonatomic,strong) NSMutableArray *iconList;@property(nonatomic,strong) NSMutableArray *homeFeedList;@property(nonatomic,assign)  homeModelBlock homeBlock;-(void)GetHomeData;@end

////  HomeModel.m//  XQB////  Created by City--Online on 15/6/24.////#import "HomeModel.h"#import "AdModel.h"#import "IconModel.h"#import "HomeFeed.h"#import "Global.h"@implementation HomeModel//NSCoding協議-(void)encodeWithCoder:(NSCoder *)aCoder{    [aCoder encodeObject:self.telPhone forKey:@"telPhone"];    [aCoder encodeObject:self.adList forKey:@"adList"];    [aCoder encodeObject:self.iconList forKey:@"iconList"];    [aCoder encodeObject:self.homeFeedList forKey:@"homeFeedList"];}- (instancetype)initWithCoder:(NSCoder *)coder{    self = [super init];    if (self) {        _telPhone=[coder decodeObjectForKey:@"telPhone"];        _adList=[coder decodeObjectForKey:@"adList"];        _iconList=[coder decodeObjectForKey:@"iconList"];        _homeFeedList=[coder decodeObjectForKey:@"homeFeedList"];    }    return self;}- (instancetype)init{    self = [super init];    if (self) {        self.adList=[[NSMutableArray alloc]init];        self.iconList=[[NSMutableArray alloc]init];        self.homeFeedList=[[NSMutableArray alloc]init];    }    return self;}//網路請求擷取資料-(void)GetHomeData{    __block HomeModel *homeModel=[[HomeModel alloc]init];    __block NSString *msg=[[NSString alloc]init];    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager shareManager];    NSMutableDictionary *parameters = [[NSMutableDictionary alloc] initWithDictionary:[CommonParameters getCommonParameters]];    [parameters addSignatureKey];    [manager GET:API_HOME_URL parameters:parameters success:^(AFHTTPRequestOperation *operation, id responseObject) {        //        XQBLog(@"\nresponseObject:%@", responseObject);        if ([[responseObject objectForKey:XQB_NETWORK_ERROR_CODE] isEqualToString:XQB_NETWORK_ERROR_CODE_OK]) {            NSMutableDictionary *dataDic = [responseObject objectForKey:@"data"];            homeModel= [self transData:dataDic];            msg=@"chenggong";            _homeBlock(homeModel,nil);                    } else {            //載入伺服器異常介面            homeModel=[self unArchiverData];            msg=@"伺服器異常";            _homeBlock(homeModel,msg);        }    }failure:^(AFHTTPRequestOperation *operation, NSError *error) {        //載入網路異常介面        msg=@"網路異常";        homeModel=[self unArchiverData];        _homeBlock(homeModel,msg);    }];    return ;}-(HomeModel *)transData:(NSDictionary *)dic{    HomeModel *homeModel=[[HomeModel alloc]init];        NSString *telPhone = DealWithJSONValue([dic objectForKey:@"telephone"]);    homeModel.telPhone=telPhone;         NSArray *adArray = [dic objectForKey:@"ads"];    for (NSDictionary *adInfo in adArray) {        AdModel *adModel = [[AdModel alloc] init];        adModel.adId = [[adInfo objectForKey:@"adId"] stringValue];        adModel.imageUrl = DealWithJSONValue([adInfo objectForKey:@"image"]);        adModel.link = DealWithJSONValue([adInfo objectForKey:@"link"]);        adModel.title = DealWithJSONValue([adInfo objectForKey:@"title"]);        [homeModel.adList addObject:adModel];    }        NSArray *homeIcons = [dic objectForKey:@"homeIcons"];    for (NSDictionary *homeIconDic in homeIcons) {        IconModel *item = [[IconModel alloc] init];        item.title = [homeIconDic objectForKey:@"title"];        item.icon = [homeIconDic objectForKey:@"icon"];        item.linkUrl = [homeIconDic objectForKey:@"linkUrl"];        item.type = [homeIconDic objectForKey:@"type"];        item.createId = [[homeIconDic objectForKey:@"createId"] stringValue];        item.iconId = [[homeIconDic objectForKey:@"id"] stringValue];        item.category = [homeIconDic objectForKey:@"category"];                [homeModel.iconList addObject:item];            }    NSArray *feedsDic = [dic objectForKey:@"feeds"];    for (NSDictionary *feedDic in feedsDic) {        HomeFeed *model = [[HomeFeed alloc] init];        model.feedId = [[feedDic objectForKey:@"feedId"] stringValue];        model.feedType = [feedDic objectForKey:@"feedType"];        model.title = DealWithJSONValue([feedDic objectForKey:@"title"]);        model.icon = DealWithJSONValue([feedDic objectForKey:@"icon"]);        model.content = DealWithJSONValue([feedDic objectForKey:@"content"]);        model.feedCity = [feedDic objectForKey:@"feedCity"];        model.linkType = [feedDic objectForKey:@"linkType"];        [homeModel.homeFeedList addObject:model];    }    [self savefile:homeModel];    return homeModel;}//解檔-(HomeModel *)unArchiverData{    NSMutableData *mutableData=[[NSMutableData alloc]initWithContentsOfFile:[self filePath]];    NSKeyedUnarchiver *unarchiver=[[NSKeyedUnarchiver alloc]initForReadingWithData:mutableData];    HomeModel *model=[unarchiver decodeObjectForKey:@"homeModel"];//    NSLog(@"%@   %@",model.telPhone,model.adList);//    for (IconModel *admodel in model.iconList) {//        NSLog(@"%@",admodel.title);//    }    return model;}//歸檔-(void)savefile:(HomeModel *)model{       NSMutableData *mutableData=[[NSMutableData alloc]init];    NSKeyedArchiver *archiver=[[NSKeyedArchiver alloc]initForWritingWithMutableData:mutableData];    [archiver encodeObject:model forKey:@"homeModel"];    [archiver finishEncoding];    [mutableData writeToFile:[self filePath] atomically:YES];    }//擷取檔案路徑-(NSString *)filePath{    NSArray *documents=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);    NSString *documentpath=[documents firstObject];    NSString *filePath=[documentpath stringByAppendingPathComponent:@"home"];    return filePath;}@end

這樣就能實現網路和ViewController的分離了,再往下可以將商務邏輯和網路層再分離,項目不大,這裡就沒有細分

IOS項目之網路分離