【解决】APP（ios端）没有Promise.allSettled

if (!Promise.allSettled) {  
    const rejectHandler = reason => ({ status: 'rejected', reason });  
    const resolveHandler = value => ({ status: 'fulfilled', value });  
    Promise.allSettled = function (promises) {  
    const convertedPromises = promises.map(p => Promise.resolve(p).then(resolveHandler, rejectHandler));  
        return Promise.all(convertedPromises);  
    };  
}

来源：有点久远，百度的

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