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    alert组件默认就是显示的 我希望默认是隐藏的,出现错误后才显示,该怎么处理?...
asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    最近在用react native做一个安卓端的app,设计师给了540dp x 960dp的设计图 但是按照设计图上的尺寸来布局的话,最后实现的效果是跟设计图是不同的 使用Dimensions API来获取虚拟机的宽高是 384 x 592 所以按照设计 ... 尺寸与模拟器的尺寸是一样的么? 这几天都在查阅相关资料,但还是不清楚,比较疑惑,还望各位指教!...
asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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1.3k views
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    两个console的实际dom节点的值 这个不行 let value ... <input type="text" ref={( ref ) => { value = ref.value }}/> <button ... submit"> 确定 </button> <button onClick={cancel}>取消</button> </form>...
asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    let number = 1; const callback = () => { console.log('callback', number); }; class Scroll { constructor(callback) { this.callback = ... count的值,再点击scroller打印count,发现每次打印的都是初始值 求解答...
asked Jan 25, 2021 in Technique[技术] by 深蓝 (71.8m points)
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