timothy1ee
commented
10 years ago When an UITextField is being edited, the isEditing property is YES. Or, when the user begins editing in a textfield, you can store the active textfield in a property like activeTextField.
Many UI elements like UITextField, UITableView, UIAlertView have events associated with them. For example, a user has begun editing, finished editing, changed text, etc.
See this video for an example of how to set and use the UITextField delegate: http://www.youtube.com/watch?v=c5SRKfGiHSg
- The mockup was deliberately ambiguous about how to handle whether to convert from Celsius to Fahrenheit or vice versa. One good option was to track which textfield was the most recently edited.
- There are two ways to register for events for a UITextField: set the delegate or use the generic control events in Interface Builder. Generally speaking, it's more common to use the UITextField delegate methods.
- Optionally, you could have enforced input validation for the temperatures.
- The best keyboard to use is the decimal keyboard. The only downside is there is no negative key.
/cc @nesquena @timothy1ee
When I run the app the click on "Convert" it doesn't quite recognize the textboxes to be empty. If I were to click on the textbox and not put anything in it then click "Convert" it sees it properly. What might be the best way to check to empty textbox?