100 examples of bug records of unity development (the first example) -- shader failure or bug after packaging

bug describe

Recently I met a bug, The project used shader Implement text border stroke , stay unity Medium good , But pack it up , The stroke disappeared , what ？？？ Just disappear , There have also been many cases of unknown origin XXX. Once you open the log, you will find ：ArgumentNullException: Value cannot be null. Parameter name: shader

bug lookup

Then crazy Baidu ... To no avail , So try to find the problem .
stay unity in , White words with black borders , The display effect is as follows ：

The package runs as follows ：

bug analysis

It is speculated that it is caused by packaging shader Is not normal , So Baidu ： pack shader Out bug. Sure enough , eureka .
It turned out to be Unity in ,Shader Is loaded from the code , There is no reference in editor . There is no problem running the project in the editor , But when the project is released to the mobile platform , Such as ios、android、UWP after , There is no match in the game shader. because Shader Not referenced in the scene , So it wasn't packed .
For detailed reasons, please refer to http://www.javashuo.com/article/p-gkbxubfx-oc.html

bug solve

terms of settlement 1

Editor——Project Setting——Graphics, an Tier Settings
take Medium Column uncheck the default value , And set up Standard Shader Quality The value is Medium etc. , The specific settings are shown in the figure below ：
Set as follows ：

Run discovery , No eggs ,pass.

terms of settlement 2

stay ProjectSettings Inside Graphics, Add the modified package with problems shader

Run discovery , Perfect solution , Thanks to Du Niang ！

terms of settlement 3

take shader Put it in the following folder ： Project name /Resources/
without Resources Folder , You need to create one , Packaging operation , Perfect solution ！

terms of settlement 4

Through analysis, we found that , It is because of the shader Packed into ab, load ab It uses Shader.Find Method .

Shader shaderOutline = Shader.Find(c_strShaderName);

And packaged into ab After shader You cannot use this static loading method , You need to load ab The form of loading shader. Then add shader Of ab Loading mode . stay AssetManager.cs Oh, my God

public Shader LoadShader(string path)    {        return LoadAsset<Shader>(path);    }

In the load shader Use the following method to load ：

var asset = AppFacade.Instance.GetManager<AssetManager>();var shader = asset.LoadAsset<Shader>("Shader/TextOutline.shader");Shader shaderOutline = shader;

I found , The perfect ending ！ But all of a sudden, I was just trying to modify someone who used this shader The prefabrication of is , Open prefabrication and find ：NullReferenceException: Object reference not set to an instance of an object

what ？？ Wrong report , Look at the location code , The formal changes above . See light suddenly , One judgment operation is missing , It depends on whether it is ab Mode to load shader, So I modified the code slowly .

if (GameConst.BundleMode){    var asset = AppFacade.Instance.GetManager<AssetManager>();    var shader = asset.LoadAsset<Shader>("Shader/TextOutline.shader");    Shader shaderOutline = shader;    graphic.material = new Material(shaderOutline);}else{    Shader shaderOutline = Shader.Find(c_strShaderName);    graphic.material = new Material(shaderOutline);}