Obtaining a transaction signature is not right

[changning420]

Hello, how to get the transaction signature by sending, receiving the address amount, oil fee nonce.

[changning420]

how to send transaction?

[changning420]

I need you !

[ricmoo]

Please see the Signer code from EthersWallet for an example:
https://github.com/ethers-io/EthersWallet-ios/blob/master/EthersWallet/src/Utilities/Signers/CloudKeychainSigner.m#L919

That should get you started. :)

[changning420]

ok,thank you!