我在角度上有此错误。如何解决它。感谢您抽出宝贵的时间。
ERROR Error: StaticInjectorError(AppModule)[UnitPriceComponent -> Subscription]:
StaticInjectorError(Platform: core)[UnitPriceComponent -> Subscription]:
NullInjectorError: No provider for Subscription!
at NullInjector.push../node_modules/@angular/core/fesm5/core.js.NullInjector.get (core.js:1060)
at resolveToken (core.js:1298)
at tryResolveToken (core.js:1242)
at StaticInjector.push../node_modules/@angular/core/fesm5/core.js.StaticInjector.get (core.js:1139)
at resolveToken (core.js:1298)
at tryResolveToken (core.js:1242)
at StaticInjector.push../node_modules/@angular/core/fesm5/core.js.StaticInjector.get (core.js:1139)
at resolveNgModuleDep (core.js:8374)
at NgModuleRef_.push../node_modules/@angular/core/fesm5/core.js.NgModuleRef_.get (core.js:9062)
at resolveNgModuleDep (core.js:8374)