防止删除一个空的函数发生未定义报错

2020-07-15 10:56:06 +08:00
parent dd65c60921
commit 13e7737cb9
5 changed files with 8 additions and 5 deletions
--- a/source/src/Utils/Emitter.ts
+++ b/source/src/Utils/Emitter.ts
@@ -34,7 +34,8 @@ class Emitter<T> {
    public removeObserver(eventType: T, handler: Function){
        let messageData = this._messageTable.get(eventType);
        let index = messageData.findIndex(data => data.func == handler);
-        messageData.removeAt(index);
+        if (index != -1)
+            messageData.removeAt(index);
    }

    /**