问题
I am working on the app which has a one text-field which should accept only numbers so I created one custom keyboard which has only [0-9] as input to accept.To use this custom keyboard one has to go setting-->keyboards then accept this and then open particular keyboard from the app.
Is this possible to force user to open only custom keyboard without going into setting option. I want whenever user opens the app.. only custom keyboard should open, not other
回答1:
Just make it numeric by default. You could also do that from interface builder.
UITextField *numericTextField = [[UITextField alloc] initWithFrame:CGRectMake(100, 10, 185, 30)];
numericTextField.adjustsFontSizeToFitWidth = YES;
numericTextField.keyboardType = UIKeyboardTypeNumberPad;
[parentView addSubview:numericTextField];
Source: How do I programmatically switch keyboard layouts on the iPad?
EDIT: Or your could use the NSNotificationCenter to inform you whether a keyboard is called and simply call your own instead:
Try something like this, didn't try myself though:
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(showKeyboard:) name:UIKeyboardWillShowNotification object:nil];
回答2:
Hi you can this using this code just make a view of your custom keyboard and add this line to show your keyboard instead of default keyboard
numericTextField.inputView = your_keyboardView;//here your_keyboardView is the object of the custom keyboard view.
UITextField *numericTextField = [[UITextField alloc] initWithFrame:CGRectMake(100, 10, 185, 30)];
numericTextField.adjustsFontSizeToFitWidth = YES;
numericTextField.inputView = yuor_keyboardView;
[parentView addSubview:numericTextField];
If you have any query then please let me know.
来源：https://stackoverflow.com/questions/24796223/ios-force-app-to-use-custom-keyboard