flutter里面的child和children的区别就是独生子女和非独生子女，child所包含的元素只有一个，而children是多个所以它里面是数组 Previous App Clip Next flutter -- AppBar 设置标题 设置颜色 隐藏底部阴影分割线 CATALOG FEATURED TAGS iOS OC HTML GCD 线程 Git flutter SwiftUI react native FRIENDS CSDN Blog 简书·Hubery_Yml Apple Apple Developer Cocoa China
