iCal仅在全新安装中添加事件错误，并通过重新启动修复

我最近发布了一个应用程序，并立即发现了一个烦人的错误。有一个按钮可将事件添加到iCal。当被按下时，用户被要求允许应用程序访问日历。如果用户单击确定，则会显示错误消息（代码中的if（！已保存））。但是，如果用户重新启动应用程序，那么一切都可以正常工作（即无需征得许可即可将项目添加到iCal中）。iCal仅在全新安装中添加事件错误，并通过重新启动修复

什么是特别讨厌的错误是它没有出现在模拟器，或任何设备的应用程序以前安装（包括删除应用程序和重置隐私设置后）。这使得难以复制。

- (IBAction)addToCal:(id)sender{ 

EKEventStore *eventStore = self.filmController.eventStore; 
/* I have moved this code to a new method, called after access is requested. See the edit...  
EKEvent *event = [EKEvent eventWithEventStore:eventStore]; 
event.title  = self.film.title; 
event.startDate = self.show.date; 
event.endDate = [[NSDate alloc] initWithTimeInterval:(60*[self.film.length integerValue]) sinceDate:event.startDate]; 
event.location = @"Cinema"; 
[event setCalendar:[eventStore defaultCalendarForNewEvents]]; 
*/ 
if([eventStore respondsToSelector:@selector(requestAccessToEntityType:completion:)]){ 
    [eventStore requestAccessToEntityType:EKEntityTypeEvent completion:^(BOOL granted, NSError *error) { 
     if(granted) { 
      BOOL saved = [self saveEventToEventStore:eventStore]; 

      NSString *msg; 
      NSString *title; 

      if(!saved) { 
       title = @"Sorry: We can't access your calendar"; 
       msg = @"Please check your access settings for the app in Settings>>Privacy>>Calendars (and try turning permissions 'Off' then 'On'). If you still can't save events then please let us know."; 
      } 
      else { 
       title = @"Added"; 
       msg = @"Item added to calendar"; 
      } 
      UIAlertView *eventAlert = [[UIAlertView alloc] initWithTitle:title message:msg delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil]; 
      [eventAlert performSelectorOnMainThread:@selector(show) withObject:nil waitUntilDone:YES]; 

     } 
     else { 
      UIAlertView *errorAlert = [[UIAlertView alloc] initWithTitle:@"Sorry: We can't access your calendar" message:@"You must change the setting for the app in Settings>>Privacy>>Calendars." delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil]; 
      [errorAlert performSelectorOnMainThread:@selector(show) withObject:nil waitUntilDone:YES]; 
     } 
    }]; 
} 
else { 
    [self saveEventToEventStore:eventStore]; 
} 
} 

-(BOOL) saveEventToEventStore:(EKEventStore *)eventStore { 

//Set event details 
EKEvent *event = [EKEvent eventWithEventStore:eventStore]; 
event.title  = self.film.title; 
event.startDate = self.show.date; 
event.endDate = [[NSDate alloc] initWithTimeInterval:(60*[self.film.length integerValue]) sinceDate:event.startDate]; 
event.location = @"Cinema"; 
[event setCalendar:[eventStore defaultCalendarForNewEvents]]; 
//event details end 

NSError *err; 
return [eventStore saveEvent:event span:EKSpanThisEvent error:&err]; 
}

任何帮助，将不胜感激....

尼克

编辑：我一直在想了很多关于这一点，但它仍然不是很明显什么是错的。我唯一的猜测是我在requestAccess之前设置了我的事件细节。这可能会引发一些错误（可能在设置日历时），导致保存失败。重新启动应用程序会从已经授予访问权限的状态启动它，因此可以避免该错误。我仍然不完全满意这个猜测，因为我认为这只会在第一次按下“添加到iCal”按钮时引发问题，而我的问题在随后的印刷机中发生。

我已经添加了上面的新的（更完整的）代码，它将requestAccess之后的事件创建。可悲的是我已经用尽了设备来测试它，但是如果我找到一个，我会更新，如果这工作。

来源

2013-05-03 Nick Jones

而且我要补充一点，因为复制我已经跑出设备的误差上测试应用程序的难度，并不能检查错误来自[eventStore saveEvent：event span：EKSpanThisEvent错误：&err]; – 2013-05-03 22:23:02

所以最后设法测试我的编辑上面，它的工作原理。所以我觉得这个问题是调用

[event setCalendar:[eventStore defaultCalendarForNewEvents]];

前

[eventStore requestAccessToEntityType:EKEntityTypeEvent completion:^(BOOL granted, NSError *error) {

来源

2013-05-07 19:52:10

iCal仅在全新安装中添加事件错误，并通过重新启动修复

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