react-native - React-Native UI Kitten Demo のフォントの問題

Question

私は長い間この問題に悩まされてきました。何時間もグーグルで調べた後、この質問を投稿することにしました。

エラーは以下です。

console.error: "fontFamily "ionicons" is not a system font and has not been loaded through Font.loadAsync.

- If you intended to use a system font, make sure you typed the name correctly and that it is supported by your device operating system.

- If this is a custom font, be sure to load it with Font.loadAsync."

__expoConsoleLog
    RemoteConsole.js:80:37
error
    YellowBox.js:59:8
error
    muteWarnings.fx.js:26:24
processFontFamily
    Font.js:35:16
diffProperties
    ReactNativeRenderer-dev.js:3545:38
addNestedProperty
    ReactNativeRenderer-dev.js:3419:6
diffProperties
    ReactNativeRenderer-dev.js:3556:8
createInstance
    ReactNativeRenderer-dev.js:4003:29
completeWork
    ReactNativeRenderer-dev.js:14437:12
completeUnitOfWork
    ReactNativeRenderer-dev.js:17094:10
performUnitOfWork
    ReactNativeRenderer-dev.js:17304:30
workLoop
    ReactNativeRenderer-dev.js:17316:41
renderRoot
    ReactNativeRenderer-dev.js:17417:15
performWorkOnRoot
    ReactNativeRenderer-dev.js:18423:17
performWork
    ReactNativeRenderer-dev.js:18324:24
performSyncWork
    ReactNativeRenderer-dev.js:18285:14
batchedUpdates$1
    ReactNativeRenderer-dev.js:18531:21
batchedUpdates
    ReactNativeRenderer-dev.js:2611:31
_receiveRootNodeIDEvent
    ReactNativeRenderer-dev.js:2706:17
receiveTouches
    ReactNativeRenderer-dev.js:2782:28
__callFunction
    MessageQueue.js:366:47
<unknown>
    MessageQueue.js:106:26
__guard
    MessageQueue.js:314:10
callFunctionReturnFlushedQueue
    MessageQueue.js:105:17

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これについて何ができますか？私はほとんどすべてを試しましたが、必要なフォントもダウンロードしました。ありがとう。