iOS 真实设备在节点上 runAction 时获取 EXC_BAD_ACCESS

- (IBAction)rotateGesture:(UIRotationGestureRecognizer*)sender {

    SKSpriteNode * face=(SKSpriteNode*)[self.skView.scene childNodeWithName:@"face_layer"];
        SKAction* action=[SKAction rotateToAngle:sender.rotation duration:0];
        
        [face runAction:action];
}

face is the SKSpriteNode and it is not nil (I have tested it.) This method is called by UIRotationGestureRecognizer and there is no exception but only crashed when I make a rotation gesture on my device.

模拟器上一切正常！！！

（我的 iPad mini 2 也可以。但 iPhone 4 不行。）

任何帮助表示赞赏！非常感谢。