拍摄第三张照片后应用程序崩溃 - iOS答案

【问题标题】：app crashing after taking 3rd picture - iOS拍摄第三张照片后应用程序崩溃 - iOS
【发布时间】：2013-03-26 09:19:44
【问题描述】：

我有一个视图，其中有 6 个图像视图。我使用相机 UIImagePickerController 设置图像。每次我选择第三张图片时，我的应用程序总是崩溃，当我检查仪器时，没有泄漏。怎么了？这是我的代码：

- (void)openCamera
{
    UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];

    if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
    {
        [imagePicker setSourceType:UIImagePickerControllerSourceTypeCamera];
        [imagePicker setDelegate:self];
        [self presentViewController:imagePicker animated:YES completion:nil];
    }
}

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    NSData* imageData = UIImageJPEGRepresentation([info objectForKey:UIImagePickerControllerOriginalImage], 0.0001f);
    [self dismissViewControllerAnimated:true completion:nil];
    if ([_selectedButton isEqualToString:@"headOffice"])
    {
        [[NSUserDefaults standardUserDefaults] setObject:imageData forKey:@"imgHeadOffice"];
        //_imgHeadOffice = [UIImage imageWithData:imageData];
        _imgViewHeadOffice.image = [UIImage imageWithData:imageData];
    }
    else if ([_selectedButton isEqualToString:@"siteOffice"])
    {
        [[NSUserDefaults standardUserDefaults] setObject:imageData forKey:@"imgSiteOffice"];
        //_imgSiteOffice = [UIImage imageWithData:imageData];
        _imgViewSiteOffice.image = [UIImage imageWithData:imageData];
    }
    else if ([_selectedButton isEqualToString:@"roadCondition"])
    {
        [[NSUserDefaults standardUserDefaults] setObject:imageData forKey:@"imgRoadCondition"];
        //_imgRoadCondition = [UIImage imageWithData:imageData];
        _imgViewRoadCondition.image = [UIImage imageWithData:imageData];
    }
    else if ([_selectedButton isEqualToString:@"vehicle"])
    {
        [[NSUserDefaults standardUserDefaults] setObject:imageData forKey:@"imgVehicle"];
        //_imgVehicle = [UIImage imageWithData:imageData];
        _imgViewVehicle.image = [UIImage imageWithData:imageData];
    }
    else if ([_selectedButton isEqualToString:@"installedTire"])
    {
        [[NSUserDefaults standardUserDefaults] setObject:imageData forKey:@"imgInstalledTire"];
        //_imgInstalledTire = [UIImage imageWithData:imageData];
        _imgViewInstalledTire.image = [UIImage imageWithData:imageData];
    }
    else if ([_selectedButton isEqualToString:@"tireScrap"])
    {
        [[NSUserDefaults standardUserDefaults] setObject:imageData forKey:@"imgTireScrap"];
        //_imgTireScrap = [UIImage imageWithData:imageData];
        _imgViewTireScrap.image = [UIImage imageWithData:imageData];
    }
}

这是我的 Instruments 快照：

编辑：应用程序在处理行时崩溃

NSData* imageData = UIImageJPEGRepresentation([info objectForKey:UIImagePickerControllerOriginalImage], 0.0001f);

我第三次拍照。
这是应用程序关闭时的日志

【问题讨论】：

这些图片是一样的吗？可能是它们的尺寸很大，而您的应用想要分配一个巨大的缓冲区，所以 ios 将其杀死
请在放置异常断点后也提供堆栈跟踪
不，它们不一样。我已将其大小调整为 0.0001f 质量（请参阅我的代码）
当您使用模拟器时，没有此类问题。在编辑方案中启用僵尸对象，您可以找出导致崩溃的对象
让我们continue this discussion in chat

标签： ios objective-c memory camera

【解决方案1】：

显然，对图像进行下采样后仍会使其大小约为 200 kb。下采样后，我将其重新缩放到 37.5%，它工作得很好。谢谢大家

【讨论】：