cocos2d: fullPathForFilename: No file found at /cc_2x2_white_image. Possible missing file. 程序运行的时候输出这条信息cocos2d: fullPathForFilename: No file found at /cc_2x2_white_image. Possible missing file.
在调用List.first 时报出该异常 看一下List 中get first方法的源码: /*** Returns the first element.** Throws a [StateError] if `this` is empty.* Otherwise returns the first element in the iteration order,* equivalent to