ionic 求助 Uncaught (in promise): Error: No provider for Headers! Error: No provider for Headers! at injectionError

[terencehyz]

ionic2 增加了一个 provider 之后，运行显示

Runtime Error
Uncaught (in promise): Error: No provider for Headers! Error: No provider for Headers! at injectionError ( http://localhost:8100/build/vendor.js:1590:86) at noProviderError ( http://localhost:8100/build/vendor.js:1628:12) at ReflectiveInjector_._throwOrNull ( http://localhost:8100/build/vendor.js:3129:19) at ReflectiveInjector_._getByKeyDefault ( http://localhost:8100/build/vendor.js:3168:25) at ReflectiveInjector_._getByKey ( http://localhost:8100/build/vendor.js:3100:25) at ReflectiveInjector_.get ( http://localhost:8100/build/vendor.js:2969:21) at AppModuleInjector.get (ng:///AppModule/module.ngfactory.js:265:156) at AppModuleInjector.getInternal (ng:///AppModule/module.ngfactory.js:469:59) at AppModuleInjector.NgModuleInjector.get ( http://localhost:8100/build/vendor.js:3936:44) at resolveDep ( http://localhost:8100/build/vendor.js:11398:45)

这个错误

有没有老哥见过这个问题

[yimity]

app.module.ts 中有没有引入？

[terencehyz]

@yimity 引入了…怕引入有问题删了重写了一次