Unity3D NGUI自适应屏幕分辨率（2014/4/17更新）_unity ongui自适应屏幕分辨率

1. PixelPerfect 完美像素：直接显示设定好的像素。当屏幕高度低于minimum Height时按比例缩小，当屏幕高度大于maximum Height时按比例扩大。
2. FixedSize 按比例缩放：在设定好的基础上，直接按比例缩放。
3. FixedSizeOnMobiles 合体版，android和ios为FixedSize方式，其它按照PixelPerfect方式。

public enum Scaling
{
	PixelPerfect,
	FixedSize,
	FixedSizeOnMobiles,
        /// <summary>
        /// 根据宽度适配
        /// </summary>
        FixedSizeofWidth,
}

2.实现还是需要FixedSize的算法，所以需要修改两个判断语句

public float GetPixelSizeAdjustment (int height)
{
	height = Mathf.Max(2, height);
        //修改1
        if (scalingStyle == Scaling.FixedSize || scalingStyle == Scaling.FixedSizeofWidth)
		return (float)manualHeight / height;
 
#if UNITY_IPHONE || UNITY_ANDROID
	if (scalingStyle == Scaling.FixedSizeOnMobiles)
		return (float)manualHeight / height;
#endif
	if (height < minimumHeight) return (float)minimumHeight / height;
	if (height > maximumHeight) return (float)maximumHeight / height;
	return 1f;
}

修改2：

public int activeHeight
:{
	get
	{
		int height = Mathf.Max(2, Screen.height);
		//修改2
		if (scalingStyle == Scaling.FixedSize || scalingStyle == Scaling.FixedSizeofWidth) 
			return manualHeight;
#if UNITY_IPHONE || UNITY_ANDROID
		if (scalingStyle == Scaling.FixedSizeOnMobiles)
			return manualHeight;
#endif
		if (height < minimumHeight) return minimumHeight;
		if (height > maximumHeight) return maximumHeight;
		return height;
	}
}

3.增加按宽度自适应算法

void Update ()
{
#if UNITY_EDITOR
	if (!Application.isPlaying && gameObject.layer != 0)
		UnityEditor.EditorPrefs.SetInt("NGUI Layer", gameObject.layer);
#endif
	if (mTrans != null)
	{
		float calcActiveHeight = activeHeight;
 
		if (calcActiveHeight > 0f )
		{
			float size = 2f / calcActiveHeight;
 
			//看这里，看这里，看这里
			if (scalingStyle == Scaling.FixedSizeofWidth)
	                {
				float radio = (float)Screen.width / Screen.height;
				size = size * radio;
			}
 
			Vector3 ls = mTrans.localScale;
 
			if (!(Mathf.Abs(ls.x - size) <= float.Epsilon) ||
			    !(Mathf.Abs(ls.y - size) <= float.Epsilon) ||
			    !(Mathf.Abs(ls.z - size) <= float.Epsilon))
			{
				mTrans.localScale = new Vector3(size, size, size);
			}
		}
	}
}

public enum Style
{
	None,
	Horizontal,
	Vertical,
	Both,
	BasedOnHeight,
        BasedOnWidth,
	FillKeepingRatio, 
	FitInternalKeepingRatio
}

	if (style == Style.BasedOnHeight)
	{
		localScale.x = relativeSize.x * rectHeight;
		localScale.y = relativeSize.y * rectHeight;
	}else if (style == Style.BasedOnWidth)
	{
	        localScale.x = relativeSize.x * rectWidth;
	        localScale.y = relativeSize.y * rectWidth; 
	}
	else if (style == Style.FillKeepingRatio)
	{……}