Knowledge Base Nr: 00340 imagesupp.m - http://www.swe-kaiser.de

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ObjC: dateihandling für images

  
- (void)saveImage:(UIImage*)image withName:(NSString*)sName
{
    if (image != nil)
    {
        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        NSString *documentsDirectory = [paths objectAtIndex:0];
        NSString* path = [documentsDirectory stringByAppendingPathComponent:
                          [NSString stringWithString: sName] ];
        CGFloat fQuality = [editSettingsImgCompress.text floatValue];
        NSData* data = UIImageJPEGRepresentation(image, fQuality);
        [data writeToFile:path atomically:YES];
    }
}

- (UIImage*)loadImage:(NSString*)sName
{
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString* path = [documentsDirectory stringByAppendingPathComponent:
                      [NSString stringWithString: sName] ];
    UIImage* image = [UIImage imageWithContentsOfFile:path];
    return image;
}

- (void)deleteFile:(NSString*)sName
{
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString* file = [documentsDirectory stringByAppendingPathComponent:
                      [NSString stringWithString: sName] ];

    [[NSFileManager defaultManager] removeItemAtPath:file error:nil];
}