Error Handling Operators
Recover with catch, retry, and replaceError.
Errors in Combine
Combine publishers have a Failure type. When a publisher fails, it terminates the stream — no more values are emitted. To build resilient pipelines you need operators that handle, transform, or recover from errors.
The Failure Type
Every publisher declares an Output and a Failure. A pipeline only compiles when error types align, so operators that change failures are common.
let publisher: AnyPublisher<Data, URLError> = apiClient.request()
// Output = Data, Failure = URLErrorAll lessons in this course
- Transforming and Combining Streams
- Schedulers and Threading
- Error Handling Operators
- Custom Publishers and Subscribers