itemWidth设置为固定，且items的宽度不足占满一屏时，位置会发生变化

[geGao123]

如题：

        pageView.delegate = self
        self.addSubview(pageView)
        pageView.whc_Left(0)
            .whc_Top(0)
            .whc_Right(0)
            .whc_Bottom(0)
        
        let layoutParam = WHC_PageViewLayoutParam()
        layoutParam.itemLayoutStyle = .text_Image
        layoutParam.titles = ["样式一","样式二","样式三","样式四"]

        layoutParam.itemWidth = 80 /***如果标题很多一屏放不下需要设定每个标题的固定宽度否则可以忽略***/
        layoutParam.selectedTextColor = UIColor.red
        
        layoutParam.normalBackgorundColor = UIColor.white
        layoutParam.normalTextColor = UIColor.black
        layoutParam.bottomLineColor = .red
        layoutParam.bottomLineHeight = 1
        layoutParam.cursorColor = .red
        
        pageView.layoutIfNeeded()
        pageView.layoutParam = layoutParam