问题描述

使用图形图片设置UIView缩略图

对一个UIView动画用图形context做了预览图片处理。

等到释放这个数组或者图片不需要再预览时，应该怎么释放内存？

用_pictureArray = nil？

- (NSMutableArray *)generateCachedImageArrayWithFilename:(NSString *)filename extension:(NSString *)extension andImageCount:(int)count{    _imagesArray = [[NSMutableArray alloc] init];    _fileExtension = extension;    _imageName = filename;    _imageCount = count;    for (int i = 0; i < count; i++)    {        NSString *tempImageNames = [NSString stringWithFormat:@""%@%i"" filename i];        NSString *imagePath = [[NSBundle mainBundle] pathForResource:tempImageNames ofType:extension];        UIImage *frameImage = [UIImage imageWithContentsOfFile:imagePath];        UIGraphicsBeginImageContext(frameImage.size);        CGRect rect = CGRectMake(0 0 frameImage.size.width frameImage.size.height);        [frameImage drawInRect:rect];        UIImage *renderedImage = UIGraphicsGetImageFromCurrentImageContext();        UIGraphicsEndImageContext();        [_imagesArray addObject:renderedImage];        if (_isDoublingFrames)        {            [_imagesArray addObject:renderedImage];        }        else if (_isTripplingFrames)        {            [_imagesArray addObject:renderedImage];            [_imagesArray addObject:renderedImage];        }        NSLog(@""filename = %@"" filename);    }    return _imagesArray;}