React Native 类似淘宝口令的实现方式

类似于淘口令的应用，打开app检测粘贴板内容，但是要求不能更改剪切板的内容，在自己的应用内只能检测一次，再者如果是自己应用内的淘口令，自己不能检测

插件链接：https://github.com/MonkZL/react-native-clipboard-command

插件用法

import { setCommand, useCommand } from 'react-native-clipboard-command';

export default function App() {
  const [commandStr, setCommandStr] = React.useState('');

  useCommand(
    (command) => {
      alert('复制过来的指令是: ' + command);
    },
    (reason) => {
      alert(reason);
    }
  );

  return (
    <View style={styles.container}>
      <TextInput
        placeholder={'请输入口令'}
        value={commandStr}
        onChangeText={setCommandStr}
        style={{
          width: '50%',
          height: 50,
          borderWidth: 1,
          paddingHorizontal: 10,
        }}
      />
      <TouchableOpacity
        style={{
          width: 100,
          height: 100,
          backgroundColor: 'red',
          alignItems: 'center',
          justifyContent: 'center',
        }}
        onPress={() => {
          setCommand(commandStr);
          alert('设置成功');
        }}
      >
        <Text>设置口令</Text>
      </TouchableOpacity>
    </View>
  );
}

android的插件实现方式 通过给ClipData设置lable来判断是否是自己复制到粘贴板的内容

@ReactMethod
  public void setCommand(String command) {
    try {
      ClipData clipdata = ClipData.newPlainText(getPackageName(), command);
      ClipboardManager clipboard = getClipboardService();
      clipboard.setPrimaryClip(clipdata);
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

  @ReactMethod
  public void getCommand(Promise promise) {
    try {
      ClipboardManager clipboard = getClipboardService();
      ClipData clipData = clipboard.getPrimaryClip();
      if (clipData == null) {
        promise.reject("0", "没有数据");
        return;
      }
      CharSequence label = clipData.getDescription().getLabel();
      if (TextUtils.equals(label, getPackageName())) {
        promise.reject("1", "自己在应用内复制的指令");
        return;
      }
      if (clipData.getItemCount() >= 1) {
        ClipData.Item firstItem = clipboard.getPrimaryClip().getItemAt(0);
        promise.resolve("" + firstItem.getText());
      } else {
        promise.reject("0", "没有数据");
      }
    } catch (Exception e) {
      promise.reject("2", e.getMessage());
    }
  }

ios的插件实现方式 通过[systemBoard addItems:@[item]]的方式设置标记

RCT_EXPORT_METHOD(setCommand:(NSString *)command)
{
    //创建系统剪切板
    UIPasteboard *systemBoard = [UIPasteboard generalPasteboard];
    //将文本写入剪切板
    systemBoard.string = command;
    //给剪切板加入一条标记性的数据，只是为了检测剪切板的数据是否来自当前应用
    NSDictionary<NSString *, id> *item = @{[[NSBundle mainBundle]bundleIdentifier]:command};
    [systemBoard addItems:@[item]];
}

RCT_EXPORT_METHOD(getCommand:(RCTPromiseResolveBlock)resolve
                  reject:(__unused RCTPromiseRejectBlock)reject)
{
    @try {
        //创建系统剪切板
        UIPasteboard *systemBoard = [UIPasteboard generalPasteboard];
        if(!systemBoard.numberOfItems) {
            reject(@"0",@"没有数据", nil);
            return;
        }
        NSArray<NSDictionary<NSString *, id> *> *items = systemBoard.items;
        long count = items.count;
        for(int i=0; i < count; i++){
            NSDictionary<NSString *, id> *item = [items objectAtIndex:i];
            if([[item allKeys] containsObject:[[NSBundle mainBundle]bundleIdentifier]]){
                reject(@"1",@"自己在应用内复制的指令", nil);
                return;
            }
        }
        resolve((systemBoard.string ? : @""));
    } @catch (NSException *exception) {
        reject(@"2",exception.reason, nil);
    } @finally {
                
    }
}