css-flex:在不肯定div高的状况下让图片文字上下左右居中

html: <div class="img"><img src=''/></div> <div class="text"><text>ddddd</text></div> css: .img{width:100%;height:100%;display:flex;align-items: center;justify-content: center;} .text{width:100%;height:100%;display:flex;align-items: center;justify-content: center;}