React本机中的ZXingObjC错误，stringByReplacingPercentEscapesUsingEncoding:是不推荐的

Question

由于此错误，生成失败。

/var/root/Library/Developer/Xcode/DerivedData/printapp3-bdgcuaoitzijpkgdxzcqqilqaxei/Build/Intermediates.noindex/ZXingObjC.build/Debug-iphonesimulator/ZXingObjC-iOS.build/Objects-normal/x86_64/ZXResultParser.o /Users/master/Desktop/biolime/cfprint/node_modules/react-native-bluetooth-escpos-printer/ios/ZXingObjC-3.2.2/ZXingObjC/client/result/ZXResultParser.m

CompileC x86_64 objective com.apple.compilers.llvm.clang.1_0.compiler (in项目“ZXingObjC”的目标“ZXingObjC”(1次失败)

在Xcode中，正如您在下面的屏幕截图中看到的那样，用这一行代码显示错误

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不推荐使用/Users/app/node_modules/react-native-bluetooth-escpos-printer/ios/ZXingObjC-3.2.2/ZXingObjC/client/result/ZXResultParser.m:252:20：'stringByReplacingPercentEscapesUsingEncoding:‘：首先，在iOS 9.0中不推荐使用-stringByRemovingPercentEncoding，它总是使用推荐的UTF-8编码。

可以帮助我完成目标-c部分的。

+ (NSString *)urlDecode:(NSString *)encoded {
  NSString *result = [encoded stringByReplacingOccurrencesOfString:@"+" withString:@" "];
  result = [result stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
  return result;
}

当我取代

result = [result stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

使用

result = [result stringByRemovingPercentEncoding:NSUTF8StringEncoding];

我面临这个错误

选择器/Users/app/node_modules/react-native-bluetooth-escpos-printer/ios/ZXingObjC-3.2.2/ZXingObjC/client/result/ZXResultParser.m:252:20：'stringByRemovingPercentEncoding:'声明为“NSString”没有可见的@接口

Answer 1

stringByRemovingPercentEncoding

不接受任何参数。只需在您想要影响的字符串上调用它，它将返回一个NSString *，结果如下：

result = [result stringByRemovingPercentEncoding];