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AFNetworking 初探

AFNetworking 初探

繼ASIHTTPRequest發佈不再維護的訊息之後,如果我們不使用CDN(雲端伺服器),AFNetworking 會是一套不錯的選擇。
下載網址:https://github.com/AFNetworking/AFNetworking

下載之後,直接匯入Xcode的專案即可以用,記得加入SystemConfiguration.framework

範例參考:

在application: didFinishLaunchingWithOptions: 加入AFNetworkActivityIndicatorManager
記得 #import “AFNetworkActivityIndicatorManager.h"

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];    [[AFNetworkActivityIndicatorManager sharedManager] setEnabled:YES];    self.window.backgroundColor = [UIColor whiteColor];        [self.window makeKeyAndVisible];    return YES;}

這是我們常用的下載網路資源(JSON 格式)
記得
#import “AFHTTPClient.h"
#import “AFHTTPRequestOperation.h"
#import “JSONKit.h"

    NSURL *url = [NSURL URLWithString:@"http://www.domain.com"];    AFHTTPClient *httpClient = [[AFHTTPClient alloc] initWithBaseURL:url];    NSString *_path=[NSString stringWithFormat:@"/user_login/%@/%@/",userName,password];    NSMutableURLRequest *request = [httpClient requestWithMethod:@"POST" path:_path parameters:nil];    [httpClient release];        AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];        [operation  setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {        //下載成功之後,使用JSONKit將字串轉成NSDictionary或NSArray 格式        NSDictionary *deserializedData = http://www.mamicode.com/[operation.responseString objectFromJSONString];>

我門做完上一個步驟,有時候會得到一些圖片的絕對網址,接下來就是根據這些網址,進行非同步下載圖片。
記得 #import “UIImageView+AFNetworking.h"
簡單的做法,是

[imageView setImageWithURL:@"圖片的絕對路徑"];

複雜的做法,可以在圖片下載完成之後,再去觸發一些事件

NSURL *url = [NSURL URLWithString:@"圖片的絕對路徑"];NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:30.0];[imageView setImageWithURLRequest:request placeholderImage:nil success:^(NSURLRequest *request, NSHTTPURLResponse *response, UIImage *image) {NSLog(@"圖片下載成功!do something");} failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error) {NSLog(@"圖片無法下載!do something"");}];

 

AFNetworking 初探