Merge pull request #1537 from AlphaWallet/preserve-value-when-switching-between-crypto-native-and-fiat-amounts

Preserve value when switching between crypto native and fiat amounts

AlphaWallet/UI/Views/AmountTextField.swift

@@ -141,11 +141,10 @@ class AmountTextField: UIControl {
 
     @objc func fiatAction(button: UIButton) {
         guard cryptoToDollarRate != nil else { return }
-        let swappedPair = currentPair.swapPair()
-        //New pair for future calculation we should swap pair each time we press fiat button.
-        currentPair = swappedPair
+        let oldAlternateAmount = convertToAlternateAmount()
+        currentPair = currentPair.swapPair()
         updateFiatButtonTitle()
-        textField.text = nil
+        textField.text = oldAlternateAmount
         computeAlternateAmount()
         activateAmountView()
         delegate?.changeType(in: self)