判断imageView的image是否为空

判断image是否为空

这里写代码    UIImage *image = [UIImage imageNamed:@""];    CGImageRef cgref = [image CGImage];    CIImage *cim = [image CIImage];    if (cim == nil && cgref == NULL)    {        NSLog(@"no image");    } else {        NSLog(@"imageView has a image");    }