usePreLoader 资源预加载,
任意组件内使用,后面考虑资源缓存问题
usePreLoader(
["/img/crate.gif","/img/crate1.gif"],
() => {
console.log("success");
},
() => {
console.log("prograss");
},
() => {
console.log("onError");
}
);
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