iphone - NSDocumentDirectory 加载图像

Question

我能够将文件数组保存在我的 NSDocumentDirectory 中。这是我使用的:

        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        NSString *documentsDir = [paths objectAtIndex:0];
        NSString *savedImagePath = [documentsDir stringByAppendingPathComponent:[NSString stringWithFormat:@"Images%d.png", i]];
         ALAssetRepresentation *rep = [[info objectAtIndex: i] defaultRepresentation];
        UIImage *image = [UIImage imageWithCGImage:[rep fullResolutionImage]];
        //NSData *imageData = UIImagePNGRepresentation(image);
        [UIImageJPEGRepresentation(image, 1.0) writeToFile:savedImagePath atomically:YES];

我的问题是如何将这种格式的图像@"Images%d.png"加载到此代码中:

.h

@property (strong, nonatomic) NSMutableArray *images;

.m

    self.images = ??????

Answer 1

用于将图像保存到NSDocumentDirectory

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
        NSString *documentsDirectory = [paths objectAtIndex:0];//m_nImageIndex
        NSString *imagename = [NSString stringWithFormat:@"savedImage%d.png",m_nImageIndex];
        NSString *savedImagePath = [documentsDirectory stringByAppendingPathComponent:imagename];
        // Get PNG data from following method
        NSData *myData =     UIImagePNGRepresentation(image);
        // It is better to get JPEG data because jpeg data will store the location and other related information of image.
        [myData writeToFile:savedImagePath atomically:NO];
        //[UIImageJPEGRepresentation(image ,1) writeToFile:savedImagePath atomically:NO];

用于检索图像

          NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,     NSUserDomainMask, YES);
          NSString *documentsDirectory = [paths objectAtIndex:0];
          NSString *getImagePath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"savedImage%d.png",indexPath.row]];
          UIImage *img = [UIImage imageWithContentsOfFile:getImagePath];

          cell.backgroundView = [[UIImageView alloc] initWithImage:img];