Keep files somewhere iOS can reach
iCloud Drive and On My iPhone are convenient places for files you want to open through the system Files interface. Other supported storage providers can also appear in Files depending on your setup.
Use a code-aware editor
Plain text tools can change source code, but line numbers, indentation and symbol suggestions make developer files easier to work with on a small display.
Save carefully
For important files, consider saving a copy until you have confirmed the edit behaves as expected. Developer File Editor supports overwriting an existing file or saving a new copy.
Know when mobile editing fits
Mobile editing is especially useful for small changes, code review, learning, fixing text or configuration, and updating a source file away from your main development environment. Complex builds and debugging still belong in the appropriate desktop toolchain.