我正在调用twitters API来为我的应用的特定部分加载一些推文。
一小部分用户在加载推文视图时报告崩溃，而其他用户根本没有问题。
我已将代码提交给Apple技术支持，他们回应让我知道NSJSONSerialization有时可以返回NSArray或NSDictionary。
显然会抛出一个错误是在NSDictionary对象上调用objectAtIndex：我相信这是我所有用户的罪魁祸首。
部分解决方案是检测它是否是数组或NSDictionary。
以下是我现在的位置：
id feedData = [NSJSONSerialization JSONObjectWithData:responseData options:0 error:&jsonError];
if ([feedData isKindOfClass:[NSArray class]]) {
//Is array
} else if ([feedData isKindOfClass:[NSDictionary class]]) {
//is dictionary
}
我基本上每次都需要一个NSArray。所以在is数组块中，我基本上只使用feedData，但是在NSDictionary中，我怎样才能将它转换为符合我需要的结构的NSArray。
老实说，最大的问题是我无法看到NSDictionary结构的样子，因为我的测试设备或模拟器都没有返回NSDictionary数据，它们都返回NSArray。
以下是将请求发送到twitter的整个getUserFeed方法：
// Get the twitter feed
NSURL *requestURL = [NSURL URLWithString:TW_API_TIMELINE];
// Set up proper parameters
NSMutableDictionary *timelineParameters = [[NSMutableDictionary alloc] init];
[timelineParameters setObject:kNumTweets forKey:@"count"];
[timelineParameters setObject:@"1" forKey:@"include_entities"];
// Create the Social Request
SLRequest *postRequest = [SLRequest requestForServiceType:SLServiceTypeTwitter requestMethod:SLRequestMethodGET URL:requestURL parameters:timelineParameters];
postRequest.account = self.delegate.userAccount;
// Perform the request
[postRequest performRequestWithHandler:^(NSData *responseData, NSHTTPURLResponse *urlResponse, NSError *error) {
dispatch_async(dispatch_get_main_queue(), ^{
// Check if we reached the reate limit
if ([urlResponse statusCode] == 429) {
// Rate limit reached
// Display an alert letting the user know we have hit the rate limit
UIAlertView *twitterAlert = [[UIAlertView alloc] initWithTitle:kRateLimitTitle
message:kRateLimitMessage
delegate:nil
cancelButtonTitle:@"Ok"
otherButtonTitles:nil];
[twitterAlert show];
// Stop animating the pull to refresh if it is animating
[self.feedTableView.pullToRefreshView stopAnimating];
return;
}
// Check if there was an error
if (error) {
NSLog(@"Error: %@", error.localizedDescription);
// Stop animating the pull to refresh if it is animating
[self.feedTableView.pullToRefreshView stopAnimating];
return;
}
// Check if there is some response data
if (responseData) {
NSError *jsonError = nil;
id feedData = [NSJSONSerialization JSONObjectWithData:responseData options:NSJSONReadingMutableContainers error:&jsonError];
if ([feedData isKindOfClass:[NSArray class]]) {
//Is array
NSLog(@"It's an Array");
} else if ([feedData isKindOfClass:[NSDictionary class]]) {
//Is dictionary
NSLog(@"It's a Dictionary");
} else {
//is something else
}
if (!jsonError) {
[self gatherTweetsFromArray:feedData];
} else {
// Stop animating the pull to refresh if it is animating
[self.feedTableView.pullToRefreshView stopAnimating];
// Alert the user with the error
UIAlertView *twitterAlert = [[UIAlertView alloc] initWithTitle:kErrorTitle
message:kErrorMessage
delegate:nil
cancelButtonTitle:@"Ok"
otherButtonTitles:nil];
[twitterAlert show];
}
} else {
// Stop animating the pull to refresh if it is animating
[self.feedTableView.pullToRefreshView stopAnimating];
// Alert the user with the error
UIAlertView *twitterAlert = [[UIAlertView alloc] initWithTitle:kErrorTitle
message:kErrorMessage
delegate:nil
cancelButtonTitle:@"Ok"
otherButtonTitles:nil];
[twitterAlert show];
}
});
}];
这是一个主要的错误，我需要压缩它，所以任何想法或信息将不胜感激！谢谢！