Question

我正在从事室内装饰应用，我们可以在相机屏幕上添加沙发，桌子，椅子台灯，然后可以通过触摸缩放UIImage缩放图片。但是通过缩放我们不想将UIImage尺寸增加到320 x 480以上，我的意思是想限制在iphone Boundary中。

任何建议，我已经实施并尝试过，但无法得到确切的解决方案。我用来检查中心的基础，但这种方法不起作用，想要一些像边缘检测这样的东西可能是精确的解决方案，

已经感谢，期待

这是我用来调整UIImageView

的一些代码

-(BOOL)isValidSizeForView:(UIView *)myView forSize:(CGSize)size
{
    BOOL Decision = NO;

    CGRect rect = myView.frame;

    CGRect BoundRect = CGRectMake(0, 0, 320, 480);

    float MinX = (BoundRect.origin.x+(myView.frame.size.width/2));

    float MaxX = ((BoundRect.origin.x+BoundRect.size.width)-(myView.frame.size.width/2));

    float MinY = (BoundRect.origin.y+(myView.frame.size.height/2));

    float MaxY = ((BoundRect.origin.y+BoundRect.size.height)-(myView.frame.size.height/2));

    if(rect.origin.x > MinX && rect.origin.x< MaxX && rect.origin.y> MinY && rect.origin.y<MaxY)
    {
        Decision = YES;
    }
    else
    {
        printf(":( no sorry \n");
    }

    return Decision;
}

Answer 1

您可以通过执行以下操作获得图像的最大缩放尺寸：

- (CGSize)zoomedSizeForImage:(UIImage *)image constrainedTo:(CGSize)maxSize {
    CGFloat width = image.size.width;
    CGFloat height = image.size.height;
    if (width > maxSize.width) {
        width = maxSize.width;
        height = height * maxSize.width / width;
    }
    if (height > maxSize.height) {
        width = width * maxSize.height / height;
        height = maxSize.height;
    }
    return CGSizeMake(width, height);
}

Restrirct Boundary 320 x 480，同时缩放UIImage

1 个答案: