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拖动ScrollView顶部的菜单栏的指示器不会移动 #5

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zhixinpeng opened this issue Mar 28, 2021 · 1 comment
Open

拖动ScrollView顶部的菜单栏的指示器不会移动 #5

zhixinpeng opened this issue Mar 28, 2021 · 1 comment

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@zhixinpeng
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在完成Lesson7实现@binding和@State的联动之后，拖动ScrollView发现菜单指示器由0变为1之后就不再变化。
但点击推荐、热门是可以的。
请问该如何解决这个问题，或者怎么定位到问题出现在哪里？
@Zakeiswo
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我发现在Coordinator的构造函数里parent根本没有刷新，但是HScrollViewController进行了三次初始化，第一次初始化的时候就给parent.pagewidth原来的值赋值为0.0了，而后面再次初始化的时候Coordinator的对象已经建立不会改变了，而且同时makeUIViewController也是只调用了一次，后面可以通过改变parent的类型变成var变量，然后在updateUIViewController里加上context.coordinator.parent = self重新告诉它parent是谁，就可以解决
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@Zakeiswo @zhixinpeng