本文分享了在解决两个编程问题的同时，享受健身房锻炼的乐趣。包括通过计算ListBox位置实现按钮事件触发，解决列表项高度不一致的问题，以及通过异步加载图片减少内存使用并使用缓存的方法。同时讨论了持续测试和优化的重要性。
Today I have gotten a Gym Card, I want to do exercise in coming two months, and it is very convenient that the gymnasium is near my home. One thing make me happy is that there get a swimming pool. Swimming is my hobby, almost one year that I have not swimming.
Today my work is continue to resolve that two problems which I mentioned a few days ago. The first problem I have implemented but should perfect, so I simulate trigger the button's event by calculate the position of the Listbox, this event will change this button's status and execute load more items by network request. But I have meet a troublesome problem that the Listbox default think every item have the same high, but in fact it is not, so it will adjust the item's high in it before loading. The second problem I remove items also by calculate the position of the Listbox, and load images I use asynchronous. So I have resolved the problem that momory use too much and could not use cache. But all of this way I should continue to test and perfect.
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