2 developerwab developerWab 于 2013.04.28 11:33 提问

好像是内存引起的崩溃,请帮忙看看

开发了一个程序,从照片数据库中导入相片。在导入的时候占了很多内存,第160个照片的时候系统崩溃了。

不知道是不是内存占用太多引起的。

谢谢

    NSDate *date = [NSDate date];

    NSDateFormatter *dateFormat = [[NSDateFormatter alloc]init];
    [dateFormat setDateFormat:@"DD_MM_YY_HH_mm_ss"];
    NSString *dateString = [dateFormat stringFromDate:date];
    int random=rand();
    // create new file names
    NSString *fileName=[[NSString alloc] initWithFormat:@"%d%@",random,dateString];
    NSString *s_fileName=[[NSString alloc]  initWithFormat:@"small_%d%@",random,dateString];
    // where to save this image
    NSString *imagePath=[self.documentsDirectory  stringByAppendingPathComponent:fileName];
    NSString *s_imagePath=[self.documentsDirectory stringByAppendingPathComponent:s_fileName];
    NSLog(@"type: %@",[rep.url pathExtension]);

    if ([[rep.url pathExtension] isEqualToString:@"JPG"]) {
        // its jpg
        NSData *rawImage=UIImageJPEGRepresentation(image, 1.0);
        NSData *thumb=UIImageJPEGRepresentation(newImage, 1.0);
        image=nil;
        newImage=nil;
        date=nil;
        dateFormat=nil;
        dateString=nil;
        random=nil;

        // Create the images
        [rawImage writeToFile:imagePath atomically:YES];
        [thumb writeToFile:s_imagePath atomically:YES];
        imagePath=nil;
        s_imagePath=nil;
        rawImage=nil;
        thumb=nil;
    }
    if ([[rep.url pathExtension] isEqualToString:@"PNG"]) {
        // its PNG
        // save it in NSData to it can be saved in the directory
        NSData *rawImage=UIImagePNGRepresentation(image);
        NSData *thumb=UIImagePNGRepresentation(newImage);
        image=nil;
        newImage=nil;
        date=nil;
        dateFormat=nil;
        dateString=nil;
        random=nil;

        // Create the images
        [rawImage writeToFile:imagePath atomically:YES];
        [thumb writeToFile:s_imagePath atomically:YES];
        imagePath=nil;
        s_imagePath=nil;
        rawImage=nil;
        thumb=nil;
    }
    // Now save it to database
    [albumObject savePhoto:fileName toFID:PassedID toName:s_fileName  albumName:singletonObj.currentAlbum photosName:singletonObj.currentPhotos];
    [display_photos addObject:[MWPhoto photoWithFilePath:[self.documentsDirectory  stringByAppendingPathComponent:fileName]]];
    UIImage *img=[UIImage imageWithContentsOfFile:[self.documentsDirectory  stringByAppendingPathComponent:s_fileName]];
    [collection_photos addObject:img];
    img=nil;
    NSArray *pObj=[[NSArray alloc] initWithObjects:fileName,s_fileName, nil];
    [photos addObject:pObj];

    pObj=nil;
    fileName=nil;
    s_fileName=nil;
} j=nil;

// Update the album photo count to reflect the changes
[albumObject updateAlbumCount:PassedID photocount:[photos count]  albumName:singletonObj.currentAlbum];
photos=[albumObject getPhotos:PassedID photosName:singletonObj.currentPhotos];
// End the loop here ***************************************************************
dispatch_async(dispatch_get_main_queue(), ^{
[self.collectionView reloadData];
[MBProgressHUD hideHUDForView:self.view animated:YES];
[self.navigationItem setHidesBackButton:NO];
[self.navigationItem.rightBarButtonItem setEnabled:YES];
});
});

}

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