ループ内で複数の残りのAPIを1つずつ呼び出す方法

Question

私は、必要に応じてサーバからローカルにデータを取得しようとしています。データはさまざまなAPI URLに存在します。私は一回のリフレッシュクリックでそれらのapiをすべて呼び出したいと思います。

-(void) call:(NSString *)url{ 

      NSURLRequest *Request1 = [NSURLRequest requestWithURL :[NSURL URLWithString:url] cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:30.0]; 
      // calling only one api 
      NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:Request1 delegate:self startImmediately:YES]; 
      //   flag = true; 
      [SVProgressHUD showWithStatus:@"Wait while we fetch data .."]; 
      if (connection){ 
       NSLog(@"connection success"); 
      } 
      else{ 
       // handle error here 
      } 

} 

Answer 1

あなたは何を試してみました？

**.h** 

    @property (nonatomic, strong) NSArray *arrURLs; 

**.m** 

- (void)viewDidLoad 
{ 
     [super viewDidLoad]; 

     self.arrURLs = [[NSArray alloc]initWithObjects:@"URL1",@"URL2",@"URL3", nil]; 
      NSTimer *timer; 

timer = [NSTimer scheduledTimerWithTimeInterval: 5 
             target: self 
             selector: @selector(fetchContent) 
             userInfo: nil 
             repeats: YES]; 

} 

-(void)fetchContent 
{ 
    [self fetchContentOnebyOne:0]; 
} 

- (void)fetchContentOnebyOne:(int)index 
    { 
    __block int cIndex = index; 


    if(index >= self.arrURLs.count) 
     return; 


NSString *strURL = [self.arrURLs objectAtIndex:index]; 

[self fetchfromServer:strURL withCompletion:^(BOOL isSuccessful) 
{ 
    if (isSuccessful) { 

     cIndex++; 

     [self fetchContentOnebyOne:cIndex]; 

    } 
    else 
    { 
     cIndex++; 
     [self fetchContentOnebyOne:cIndex]; 
    } 
    if (cIndex == self.arrURLs.count) { 
     NSLog(@"updated all content...."); 
    } 
}]; 
} 



- (void)fetchfromServer:(NSString*)strURL withCompletion:(void (^)(BOOL isSuccessful))completion 
{ 

NSURLRequest *Request1 = [NSURLRequest requestWithURL :[NSURL URLWithString:strURL] cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:30.0]; 
NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:Request1 delegate:self startImmediately:YES]; 
//   flag = true; 
[SVProgressHUD showWithStatus:@"Wait while we fetch data .."]; 
if (connection){ 
    NSLog(@"connection success"); 
    completion(true); 
} 
else{ 
    // handle error here 
    completion(false); 
} 

}