Question

该应用程序在游戏中保持得分。根据您的分数，它将使用GET方法从在线数据库中检索报价并以JSON格式返回。例如，你的得分是5，得到1分，10，得到2，依此类推。显示引用的视图是UIViewController，其中包含UITextView。

我有一个基于分数运行的for loop，在1.5秒延迟后一遍又一遍地运行相同的GET请求，因此容纳数据库的服务器不会拒绝几乎同时发出的请求。

我创建了一些NSStrings并从JSON数据中提取信息，将其附加到一些基本HTML代码中，然后将其设置为UITextView attributedText。

大多数情况下这种情况很好，但每隔一段时间，我就会期待2个引号，而且只会得到1，或者某些引号最终会相同。

有人可以告诉我，如果有更好的方法可以做到这一点，而不是我现在的状态吗？

- (void)viewWillAppear:(BOOL)animated {

    if ([textView.text isEqualToString:@""]) {
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    NSInteger getReady = [defaults integerForKey:@"after"];
    self.theNumber = getReady;
   for(int i = 0; i< self.theNumber; i++) {
       [self performSelector:@selector(quoteView) withObject:self afterDelay:1.5 ];
    }
    }

}
-(void) quoteView {




    NSString *bringitalltogether = @"http://url.com&type=json";
    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 didReceiveResponse:(NSURLResponse *)response {
    if ([response isKindOfClass:[NSHTTPURLResponse class]])
    {
        NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse*) response;

        if (code == 200){

        }

        else
        {
            UIAlertView *oops = [[UIAlertView alloc] initWithTitle:@"Oops" message:@"The network is having difficulties getting you the quote.  Please check your network settings and try again later." delegate:self cancelButtonTitle:@"Ok" otherButtonTitles: nil];
            [oops show];
        }

    }
}

- (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 {
    if (!self.theArray) {

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

    }


    NSString *doIt = [NSString stringWithFormat:@"%@ - %@ %@:%@", self.textstring, self.bookstring, self.chapterstring, self.versestring];
    [self.theArray addObject:doIt];
    NSString *theEnd = [self.theArray componentsJoinedByString:@"\n"];

    NSString *loadHTML = [@"<head> <style type='text/css'>a > img {pointer-events: none;cursor: default;}</style></head><b><div align=\"left\"><font size=5>"  stringByAppendingString:theEnd];
    NSAttributedString *attributedString = [[NSAttributedString alloc] initWithData:[loadHTML dataUsingEncoding:NSUnicodeStringEncoding] options:@{ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType } documentAttributes:nil error:nil];
    textView.attributedText = attributedString;
    NSLog(@"ARRAY:  %@", self.theArray);
    NSLog(@"String:  %@", theEnd);

}
-(IBAction)finished {
    [self dismissViewControllerAnimated:YES completion:nil];
    textView = nil;
}

从NSLogs到最后，有时NSMutableArray包含几个相同的引号，这就是为什么它们不会在字符串中显示，因为它可以消除重复。我的问题是，是否有更好的方法可以防止这些错误发生？

Answer 1

这是一些伪代码

mutableArray = new NSMutableArray
while([mutableArray count] < total) {
   quote = getQuote()
   if([array indexOfObject:quote] != NSNotFound) 
      [mutableArray addObject:quote]
}

这将确保您没有重复的引号。获得有效引号数组后，可以按照自己的方式构造字符串。

在iOS App中向NSMutableArray添加多个GET请求

1 个答案: