/// <summary>
/// Destroy all components of the specified type attached to current <see cref="GameObject" />.
/// </summary>
/// <param name="self">The <see cref="GameObject" /> instance components attached to.</param>
/// <typeparam name="T">Type of components to destroy.</typeparam>
/// <returns>Number of components destroyed.</returns>
public static int DestroyComponents <T>(this GameObject self)
where T : Component
{
var components = self.GetComponents <T>();
foreach (var component in components)
{
UnityObjectUtil.Destroy(component);
}
return(components.Length);
}
public static void DestroyChildren(this Transform self, Action <Transform> beforeDestroy = null)
{
Ensure.Argument.NotNull(self, nameof(self));
while (self.childCount > 0)
{
var child = self.GetChild(0);
beforeDestroy?.Invoke(child);
child.SetParent(null);
UnityObjectUtil.Destroy(child.gameObject);
}
}
public static void DestroyChildren(this Transform self,
Func <Transform, bool> predicate = null, Action <Transform> beforeDestroy = null)
{
UnityEnsure.Argument.NotNull(self, nameof(self));
var destroyList = self.OfType <Transform>().Where(c => predicate == null || predicate(c)).ToArray();
foreach (var child in destroyList)
{
beforeDestroy?.Invoke(child);
UnityObjectUtil.Destroy(child.gameObject);
}
}
public static void DestroyChildren(this Transform self, Func <Transform, bool> predicate)
{
Ensure.Argument.NotNull(self, nameof(self));
var destroyList = new List <Transform>();
for (int i = 0; i < self.childCount; ++i)
{
var child = self.GetChild(i);
if (predicate.InvokeIfNotNull(child))
{
destroyList.Add(child);
}
}
for (int i = 0; i < destroyList.Count; ++i)
{
UnityObjectUtil.Destroy(destroyList[i].gameObject);
}
}
public static T GetInstance(bool createOnNotFound)
{
if (instance != null)
{
return(instance);
}
instance = UnityObjectUtil.FindUniqueSceneComponent <T>();
if (instance == null)
{
if (createOnNotFound)
{
var gameObject = new GameObject(typeof(T).Name);
instance = gameObject.AddComponent <T>();
}
else
{
throw new InvalidOperationException($@"Instance of ""{typeof(T)}"" not found.");
}
}
return(instance);
}
private static void DestroyInstance(RootBehaviour inst)
{
UnityObjectUtil.Destroy(inst.gameObject);
_instances.Remove(inst);
}
