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社区首页 >问答首页 >WritableArray.size()在RN 0.55.4 (安卓)中始终为1

WritableArray.size()在RN 0.55.4 (安卓)中始终为1
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Stack Overflow用户
提问于 2018-05-25 10:50:16
回答 1查看 183关注 0票数 0

在Android中,我有一个使用WritableArray的本地模块,如下所示:

public class UploadVideoModule extends ReactContextBaseJavaModule {
public WritableArray test=Arguments.createArray();
 UploadCallBack uploadCallBack = new UploadCallBack() {
        @Override
        public void testArray(int i) {
            test.pushString("aa "+i);
            System.out.println("================= wa test ============test:"+test+" ,size:"+test.size());
        } }

@Override
    public String getName() {
        return REACT_MODULE_NAME;
    }

    public UploadVideoModule(ReactApplicationContext reactContext) {
        super(reactContext);
        WritableArray wa=Arguments.createArray();
        wa.pushString("aaaaaaaaa");
        wa.pushString("bbbbbbbbb");
        wa.pushString("ccccccccc");
        Log.e(TAG,"======= wa ==========="+wa);
        Log.e(TAG,"======= wa ==========size:"+wa.size());
for (int i =0;i<5;i++){
            uploadCallBack.testArray(i);
        }
    }

 interface UploadCallBack {
        void testArray(int i);
    }
}

// ================log结果===================

E/tvb.react.uploadvideo.UploadVideoModule:======= wa ==========="aaaaaaaaa","bbbbbbbbb","ccccccccc“======= wa ==========size:3

================= wa测试============test:"aa 0“,大小:1

================= wa测试============test:"aa 0","aa 1“,大小:1

================= wa测试============test:"aa 0","aa 1","aa 2“,大小:1

================= wa测试============test:"aa 0","aa 1","aa 2","aa 3“,大小:1

================= wa测试============test:"aa 0","aa 1","aa 2","aa 3","aa 4“,大小:1

这些结果太奇怪了!为什么wa的大小是正确的,但是test总是1?我发现当我用RN 0.51运行时,所有的都是正常的,大小是正确的!不幸的是,当运行在RN 0.55.4时,它有问题。

环境:

操作系统: macOS 10.13.4

节点: v9.9.0

npm: 5.6.0

守望者: 4.9.0

Android Studio: 3.1

软件包:(需要安装=> )

"react":"16.3.2",

"react-native":"0.55.4",//来自0.51 =>0.55.4

步骤复制复制上面的代码,然后在RN 0.51和0.55.4中运行,你会发现它不一样!!

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页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接:

https://stackoverflow.com/questions/50520817

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