Question

我有一个使用for循环运行多次的API GET请求。我成功地能够从中创建一些NSStrings，但鉴于循环，我需要一个很好的方法将它们存储在一起。所以，在connectionRequest结束时，我让它运行另一个方法，在那里我将NSString添加到NSMutableArray。但是，当我检查NSMutableArray的内容时，它只是那里最新的NSString。我错过了什么？

- (void)viewWillAppear:(BOOL)animated {

   for(int i = 0; i< self.theNumber; i++) {
        [self getQuote];
    }


}
-(void) getQuote {




    NSString *bringitalltogether = @"URLOFAPI";
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:bringitalltogether]
                                                           cachePolicy:NSURLRequestReloadIgnoringLocalAndRemoteCacheData timeoutInterval:60];
    [request setHTTPMethod:@"GET"];


    NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
    [connection start];

}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {

    NSMutableDictionary *allResults = [NSJSONSerialization
                                       JSONObjectWithData:data
                                       options:NSJSONReadingAllowFragments
                                       error:nil];
    NSArray *book = [allResults valueForKey:@"bookname"];
    self.bookstring = [book objectAtIndex:0];
    NSArray *chapter = [allResults valueForKey:@"chapter"];
    self.chapterstring = [chapter objectAtIndex:0];

    NSArray *verse = [allResults valueForKey:@"verse"];
    self.versestring = [verse objectAtIndex:0];

    NSArray *text = [allResults valueForKey:@"text"];
    self.textstring = [text objectAtIndex:0];

    [self doneGotIt];
   }
- (void) doneGotIt {
    self.theArray = [[NSMutableArray alloc] init];
    NSString *doIt = [NSString stringWithFormat:@"%@ - %@ %@:%@", self.textstring, self.bookstring, self.chapterstring, self.versestring];
    [self.theArray addObject:doIt];
    NSLog(@"%@", self.theArray);
}

控制台显示NSLog运行了适当的次数，但是每次，当我希望它逐渐增长时，数组只保留一节。

Answer 1

您每次都在创建新的数组实例。多数民众赞成，你们最后一部分。

- (void) doneGotIt {
//Create array only once if not yet created in memory
    if (!self.theArray) {

        self.theArray = [[NSMutableArray alloc] init];

    }

    NSString *doIt = [NSString stringWithFormat:@"%@ - %@ %@:%@", self.textstring, self.bookstring, self.chapterstring, self.versestring];
    [self.theArray addObject:doIt];
    NSLog(@"%@", self.theArray);
}

将几个NSStrings添加到NSMutableArray

1 个答案: