public static T GetProjectSettings <T>() where T : ProjectSettings
{
Type type = typeof(T);
if (!Attribute.IsDefined(type, typeof(AssetPathAttribute)))
{
throw new ArgumentException("Type does not have a AssetPathAttribute!");
}
AssetPathAttribute assetPathMeta = Attribute.GetCustomAttribute(type, typeof(AssetPathAttribute), false) as AssetPathAttribute;
T settings = AssetDatabase.LoadAssetAtPath <T>(assetPathMeta.FullPath);
if (settings == null && assetPathMeta.CreateAssetIfMissing)
{
settings = ScriptableObject.CreateInstance(type) as T;
if (!Directory.Exists(assetPathMeta.Path))
{
Directory.CreateDirectory(assetPathMeta.Path);
}
AssetDatabase.CreateAsset(settings, assetPathMeta.FullPath);
AssetDatabase.SaveAssets();
AssetDatabase.Refresh(ImportAssetOptions.Default);
}
if (settings == null)
{
throw new NotImplementedException();
}
return(settings);
}
public override float GetPropertyHeight(SerializedProperty property, GUIContent label)
{
AssetPathAttribute attribute = (AssetPathAttribute)base.attribute;
float baseHeight = base.GetPropertyHeight(property, label);
if (!attribute.type.IsSubclassOf(typeof(Object)))
{
return(baseHeight + 20.0f);
}
else if (property.propertyType == SerializedPropertyType.String)
{
return(baseHeight);
}
else
{
return(baseHeight + 20.0f);
}
}
public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
{
AssetPathAttribute attribute = (AssetPathAttribute)base.attribute;
if (!attribute.type.IsSubclassOf(typeof(Object)))
{
//显示文件类型错误提示
EditorGUI.HelpBox(position, string.Format("{0} : AssetPathAttribute.type is not subclass of UnityEngine.GameObject", property.displayName), MessageType.Error);
}
else
{
if (property.propertyType == SerializedPropertyType.String)
{
//绘制属性框
property.stringValue = FileField(position, property.displayName, property.stringValue, attribute.type);
}
else
{
//显示非字符串错误提示
EditorGUI.HelpBox(position, string.Format("{0} : property type is not System.String", property.displayName), MessageType.Error);
}
}
}