Question

我的iOS应用程序中有以下代码，我有人创建。然而，该应用程序的这一部分打破并崩溃它。

   if([[dictHomeSettings allKeys] containsObject:@"notify_url"]) {
        NSString *notifyUrl = [dictHomeSettings objectForKey:@"notify_url"];
        if(notifyUrl.length>0) {
            dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0ul);
            dispatch_async(queue, ^(void) {
//                    //  You may want to cache this explicitly instead of reloading every time.
//                    NSData *notifyData = [NSData dataWithContentsOfURL:[NSURL URLWithString:notifyUrl]];
//                    NSError* error;
//                    NSDictionary* json = [NSJSONSerialization JSONObjectWithData:notifyData
//                                                                         options:kNilOptions
//                                                                           error:&error];

                XMLDictionaryParser *xmlParser = [XMLDictionaryParser new];
                NSXMLParser *parser = [[NSXMLParser alloc] initWithContentsOfURL:[NSURL URLWithString:notifyUrl]];
                NSDictionary *aDict = [xmlParser dictionaryWithParser:parser];

                dispatch_async(dispatch_get_main_queue(), ^{
                    //NSLog(@"myNsArray : %@",aDict);
                    if([[aDict allKeys] containsObject:@"Notification"]) {
                        NSArray *array = [aDict objectForKey:@"Notification"];
                        if(array.count>0) {
                            [Common deletePreviousLocalNotifications];
                            for(NSDictionary *dictNotification in array) {
                                NSDateFormatter *dateFormatter = [NSDateFormatter new];
                                [dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];

                                if([Common compareDate:[dictNotification objectForKey:@"StartTime"] isGreaterThanOrEqualDate:[dateFormatter stringFromDate:[NSDate date]]]) {
                                    NSLog(@"adding notification : %@",dictNotification);
                                    [Common addLocalNotificationAtDateTime:[dateFormatter dateFromString:[dictNotification objectForKey:@"StartTime"]] AlertBody:[dictNotification objectForKey:@"Message"] UserInfo:[NSDictionary dictionaryWithObjectsAndKeys:[dictNotification objectForKey:@"URL"], @"URL", nil]];
                                }
                            }
                        }
                    }
                });
            });

Answer 1

你试图打电话给＃34; objectForKey＆＃34;在NSString对象上。请检查您认为是NSDictionary对象的对象是否实际是NSDictionary对象实例。

Answer 2

显然，您正试图在NSString对象上调用 objectForKey 。如所观察到的[dictNotification objectForKey:@"StartTime"]是Number值，但您假设它是一个字符串（我不确定）。所以你在这次电话会议上得到error

[Common compareDate:(Number *) isGreaterThanOrEqualDate:(NSString *)];

您可以在Symbolic breakpoint上设置带有此符号的[NSObject doesNotRecognizeSelector:]，以便轻松debug代码。

终止应用程序 - ＆＃39; NSInvalidArgumentException＆＃39;，原因：＆＃39; - [NSCFString objectForKey：]：无法识别的选择器发送到实例

2 个答案: