將圖片寫入手機相冊: UIImageWriteToSavedPhotosAlbum(##圖片##, nil, nil, nil);

ASI的使用

1.依賴 Reachability
2.依賴3個庫
? SystemConfiguration.framework
? MobileCoreServices.framework
? libz.1.2.5.dylib

使用ASI下載文件

/**************** 下載 ******************/
1. 創建請求對象
NSURL *url = [NSURL URLWithString:##需要下載的文件路徑##];
ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:url];
2. 下載後文件所在路徑
NSString *path = ##下載後文件所在路徑##;
request.downloadDestinationPath = path;
3.1 設置下載進度代理(需要遵循協議:ASIDownloadProgressDelegate)
>1. request.downloadProgressDelegate = self;
>2. 實現下載進度代理方法
- (void)setProgress:(float)newProgress{
    NSLog(@"當前下載進度: %f", newProgress);
}
// 上面2步可以一步解決
request.downloadProgressDelegate = self.progressView;
4. 支持斷點下載
request.allowResumeForFileDownloads = YES;
5. 發送請求
[request startAsynchronous];

/**************** 上傳 ******************/
1.創建請求
NSURL *url = [NSURL URLWithString:##需要下載的文件路徑##];
ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:url];
2. 指定所要上傳文件的路徑
[request setFile:file ofKey:@"file"];
3. 設置其他參數
[request setPostValue:@""];

ASIDownloadCache緩存

1. 取得默認的緩存對象
ASIDownloadCache *cache = [ASIDownloadCache sharedCache];
2. 設置緩存策略
- (void)setDefaultCachePolicy:(ASICachePolicy)cachePolicy;
3. 設置緩存路徑
- (void)setStoragePath:(NSString *)path;

AFN(AFNetworking)

AFHTTPRequestOperationManager *man = [AFHTTPRequestOperationManager manager];
[man GET:##地址## parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject){
    NSLog(@"請求成功");
} failure: ^(AFHTTPRequestOperation *operation, NSError *error){
    NSLog(@"請求失敗");
}];

AFN檢測網絡狀態

AFNetworkReachabilityManager *man = [AFNetworkReachabilityManager sharedManager];
[man setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
    switch (status) {
        case AFNetworkReachabilityStatusUnknown: // 未知網絡
            break;
        case AFNetworkReachabilityStatusNotReachable: // 沒有網絡
            break;
        case AFNetworkReachabilityStatusReachableViaWiFi: // wifi網絡
            break;
        case AFNetworkReachabilityStatusReachableViaWWAN: // 手機自帶網絡
            break;
        default:
            break;
    }
}];
[man startMonitoring];

打開相冊

UIIimagePickerController *ipc = [[UIIimagePickerController alloc] init];
ipc.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentViewController:ipc animated:YES completion:nil];

WebView

OC中執行JavaScript代碼
[self.webView stringByEvaluatingJavaScriptFromString:##JS代碼##];