iphone - 保存用户默认值时出现随机 BAD ACCESS

Question

我只是想将此数组保存为用户默认值，它会随机崩溃。有时它有效，有时它给了我 EXC_BAD_ACCESS。我是否没有正确发布某些内容？

- (void)setTextValue:(NSString *)valueText indexToSet:(NSUInteger)index
{
    [self.pageData replaceObjectAtIndex:index withObject:valueText];
    [[NSUserDefaults standardUserDefaults] setObject:self.pageData forKey:@"mynotes"];
}

这是我确定导致错误的方法。这是一个已经由 Xcode 创建的方法，我向其中添加了自己的自定义代码。

- (nbookDataViewController *)viewControllerAtIndex:(NSUInteger)index storyboard:(UIStoryboard *)storyboard
{   
    nbookDataViewController *dataViewController = [storyboard instantiateViewControllerWithIdentifier:@"nbookDataViewController"];
    if (self.pageData.count > 0 && index < self.pageData.count)
    {
        NSString *val = (NSString *)[self.pageData objectAtIndex:index];
        dataViewController.dataObject = val;
    }
    else
    {
        NSDate *date = [NSDate date];
        NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
        [dateFormat setDateFormat:@"MMMM d, YYYY"];
        NSString *dateString = [dateFormat stringFromDate:date];
        //[dateFormat release];
        [self.pageData addObject:dateString];
        dataViewController.dataObject = (NSString *)[self.pageData objectAtIndex:index];
    }
    dataViewController.myModel = (nbookModelController *)self;
    dataViewController.dIndex = index;
    //[self.mySaveData setObject:self.pageData forKey:@"mynotes"];
    return dataViewController;
}

Answer 1

此技巧将允许您编写代码以中断异常并让您直接检查发生这种情况的原因: https://stackoverflow.com/a/616526/46970