promise.md

# Promise

Promise 对象表示异步操作最终的完成（或失败）以及其结果值。

### Constructor(fn)

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### Constructor(fn)

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## 实例方法


### then()

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### then(onFulfilled, onRejected?)

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### then(onFulfilled, onRejected?)

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### then(onFulfilled, onRejected?)

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### then(onFulfilled, onRejected?)

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### catch()

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### catch(onRejected)

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### catch(onRejected)

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### catch(onRejected)

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### catch(onRejected)

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### finally(callback)

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### resolve()

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### resolve(value)

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### resolve(value)

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### reject(value?)

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### all(arr)

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### race(arr)

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### any(arr)

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### allSettled(arr)

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## Bug & Tips@tips

* 目前 Promise 类型编译到 kotlin 为 io.dcloud.uts.UTSPromise
* 编译到swift时暂不支持。但在uvue里因为iOS默认js驱动所以可以使用Promise