Does anyone know a way to enter a negative number into a number field on a Iphone. Here is a screen shot.
As you see there is not a place to select -.
This can easily be done on an Andriod of course.
for a column type of number, its not supported (dont know if its a bug)
you can use a single line textbox and use regular expression (under validation) to validate the users input
will prevent the user to enter characters
and will allow the user to enter minus numbers
im not very good in regex so modify it to meet your needs
hope that solves your issue
According to the internet this seems to be the only way: How to Enable Numeric Signal Strength on an iPhone - Snapguide
Not really user friendly -, but It can maybe help.
1. Open the Phone app and from the keypad dial *3001#12345#* and then tap the Callbutton.
2. Once in Field Test mode, you will see a negative number instead of the five dots in the upper-left corner. The closer to zero, the stronger your signal. As a rule of thumb, according to, "around -113 decibels is on the low end of the signal bar range, and around -50 decibels is on the high end." If you press the Home button to exit Field Test mode normally, the dots will return. We want to keep the numbers around, so instead of hitting the Home button, hold down the power button until the Slide to power off message appears.
3. Release the power button and from the power off screen, hold down the Home button for roughly five seconds until you exit Field Test mode. The signal strength numbers will remain and you can toggle between the numbers and the dots by tapping on them. Force iPhone to show numerical value for signal strength - CNET