Question

- (void)syncWithCalendar
{

    NSMutableDictionary *dictionary = [util readPListData];  
    NSMutableArray *courses = [util getCourses];  
    __block NSMutableArray *lessons;   
    __block NSMutableDictionary *lesson;    
    NSString *studentID = [util getProgramDetails].studentId;  
    NSString *programName = [util getProgramDetails].programName;

    __block NSString *startDateString = @"", *endDateString = @"";

    NSDateFormatter *formatter;  
    formatter = [[NSDateFormatter alloc] init];  
    [formatter setDateFormat:@"MM/dd/yyyy HH:mm:ss"];  
    [formatter setDateFormat:@"MM/dd/yyyy"];  

    NSString *currentDateString = [NSString stringWithFormat:@"%@ 09:00:00", [formatter stringFromDate:[NSDate date]]];  
    [formatter setDateFormat:@"MM/dd/yyyy HH:mm:ss"];

    NSDate *currentDate = [formatter dateFromString:currentDateString];

    self.eventstore = [[EKEventStore alloc] init];

   [self.eventstore requestAccessToEntityType:EKEntityTypeEvent completion:^(BOOL granted, NSError *error)  
    {  
        if (granted) {  

            NSLog(@"calendar access granted");

            for (int i=0; i<[courses count]; i++)
            {
                lessons = [[courses objectAtIndex:i] objectForKey:@"lessons"];
                for (int j=0; j<[lessons count]; j++)
                {
                    lesson = [lessons objectAtIndex:j];
                    NSString *title = nil;
                    title = [NSString stringWithFormat:@"%@ %@-Complete %@ lesson",studentID,programName,[lesson objectForKey:@"lesson-name"]];

                    startDateString = [NSString stringWithFormat:@"%@ %@", [lesson objectForKey:@"exam-date"], @"09:00:00"];
                        endDateString = [NSString stringWithFormat:@"%@ %@", [lesson objectForKey:@"exam-date"], @"18:00:00"];

                    if (!([startDateString isEqualToString:@""] && [endDateString isEqualToString:@""]))
                    {
                        EKEvent *event = [EKEvent eventWithEventStore:self.eventstore];
                        event.title=title;
                        event.startDate = [formatter dateFromString:startDateString];
                        event.endDate = [formatter dateFromString:endDateString];

                        event.allDay = NO;

                        [event setCalendar:[self.eventstore defaultCalendarForNewEvents]];


                       NSError *err = nil;
             [self.eventstore saveEvent:event span:EKSpanThisEvent commit:YES error:&err];
           //[self.eventstore saveEvent:event span:EKSpanThisEvent error:&err];
                            if (err) {
                                NSLog(@"event not saved .. error = %@",err);
                            } else {
                                NSLog(@"event added successfully");
                            }       
                    }
                } // lessons for loop
            } // courses for loop

        } else {
            NSLog(@"Access not granted");
        }
    }];

    [self.eventstore release];  
    [formatter release];
}

成功添加事件后，显示：

“收到内存警告。终止以响应SpringBoard的终止”

并且应用程序终止。这在iOS 7设备中发生。我还没有在iOS 6及以下版本中查看过它。如果只保存了少量事件（30或更少），则代码可以正常工作，但在保存时会显示80个事件或更多事件的内存问题。

Answer 1

最后我找到了问题的答案。我想分享我的解决方案，以便它可以帮助其他人......

我特意在iOS 7中遇到崩溃，这是因为下面的行

//错了 [self.eventstore saveEvent：event span：EKSpanThisEvent commit：YES error：＆amp; err];

保存事件的正确方法:(注意：我的案例不需要事件标识符）
//正确的 [self.eventstore saveEvent：event span：EKSpanThisEvent commit：NO error：＆amp; err]; 然后使用 [self.eventstore commit：NULL]

保存所有事件后。这阻止了我的崩溃。

Answer 2

切换到ARC可以解决内存问题，但是大量数据可能仍会出现问题。尝试在内部使用@autorelease池进行循环，如例子

for (int i=0; i<[courses count]; i++)
            {
@autoreleasepool {
                lessons = [[courses objectAtIndex:i] objectForKey:@"lessons"];
                for (int j=0; j<[lessons count]; j++)
                {
                    lesson = [lessons objectAtIndex:j];
                    NSString *title = nil;
                    title = [NSString stringWithFormat:@"%@ %@-Complete %@ lesson",studentID,programName,[lesson objectForKey:@"lesson-name"]];

                    startDateString = [NSString stringWithFormat:@"%@ %@", [lesson objectForKey:@"exam-date"], @"09:00:00"];
                        endDateString = [NSString stringWithFormat:@"%@ %@", [lesson objectForKey:@"exam-date"], @"18:00:00"];

                    if (!([startDateString isEqualToString:@""] && [endDateString isEqualToString:@""]))
                    {
                        EKEvent *event = [EKEvent eventWithEventStore:self.eventstore];
                        event.title=title;
                        event.startDate = [formatter dateFromString:startDateString];
                        event.endDate = [formatter dateFromString:endDateString];

                        event.allDay = NO;

                        [event setCalendar:[self.eventstore defaultCalendarForNewEvents]];


                       NSError *err = nil;
             [self.eventstore saveEvent:event span:EKSpanThisEvent commit:YES error:&err];
           //[self.eventstore saveEvent:event span:EKSpanThisEvent error:&err];
                            if (err) {
                                NSLog(@"event not saved .. error = %@",err);
                            } else {
                                NSLog(@"event added successfully");
                            }       
                    }
                } // lessons for loop
}//autoreleasepool
            } // courses for loop

这样每个for循环步骤都会释放所有自动释放对象。

Answer 3

@upendar我也有相同的情景，但我被分成小块，I.E。就像你有80个要同步的事件需要20-20并暂停2-5秒。它们之间。 autoreleasepool很好用，但是Calendar需要太多内存才能执行。一段时间内需要100％以上。

我很喜欢这个问题。真有意思的一个!!!

保存80个生成器后接收内存警告

3 个答案: