This usually happens because App has not registered FormsModule to be used. So just go into your main app.module.ts and add: import { FormsModule } from ‘@angular/forms’; and add the same to imports as well: …
Delete the text NSNotification.Name. written before the UIResponder to remove the error.
If statements are used to compare the optional value to nil .If there is a value then we can obtain the value stored in the optional by adding ! at …
This error may occur due to the fact that a constant is assigned a optional type and not provided with explicit value. Constants can be assigned with a value only …
We can convert errors to optional value by using try?..try!. If we want to disable error propagation (knowing that error won’t be happening) we can use try! instead of try?
We handle errors propagated to the calling function from a catch clause using do-catch statements. Any errors that are nor mentioned in error protocol we defined, the error is …
We can use do-catch statements to handle errors in Swift. We have to include the error throwing function call along with try keyword inside the do block and match error patterns in catch block.
Initializers can also throw errors by calling error throwing functions and propagate the error to the caller.
In order to indicate that a function, method or initializer can throw errors, we have to mention the throws keyword after the function parameters and before the return arrow. The throws …
