IOS Alertcontroller comes with an input box

Uialertcontroller *alertcontroller = [Uialertcontroller alertcontrollerwithtitle:nil message:@ "Please enter the payment password" Preferredstyle:uialertcontrollerstylealert];

Add Cancel button;

[Alertcontroller addaction:[uialertaction actionwithtitle:@ "Cancel" Style:uialertactionstyledefault handler:^ ( Uialertaction * _nonnull action) {

}]];

Add the OK button;

[Alertcontroller addaction:[uialertaction actionwithtitle:@ "OK" Style:uialertactionstyledefault handler:^ ( Uialertaction * _nonnull action) {

Gets the 1th input box;

Uitextfield *usernametextfield = AlertController.textFields.firstObject;

NSLog (@ "Pay password =%@", usernametextfield.text);

}]];

Define the first input box;

[Alertcontroller addtextfieldwithconfigurationhandler:^ (Uitextfield * _nonnull TextField) {

Textfield.placeholder = @ "Please enter the payment password";

Textfield.securetextentry = YES;

}];

[Self Presentviewcontroller:alertcontroller animated:true completion:nil];

IOS Alertcontroller comes with an input box