UITextField isn't working

@interface practiceViewController : UIViewController <UITextFieldDelegate>
{
    UITextField *userInput;
}
@property (nonatomic, retain, readwrite) UITextField *userInput;
@end

-(UITextField *)userInput{
if (userInput == nil) {

userInput=[[UITextField alloc]init];
userInput.keyboardType= UIKeyboardTypeNumberPad;
userInput.returnKeyType= UIReturnKeyDone;
userInput.textColor=[ UIColor redColor];
userInput.clearButtonMode= UITextFieldViewModeWhileEditing;
userInput.delegate = self;
}

return userInput;

int nInput=[[userInput text] intValue];

int nInput = [[userInput text] intValue];

[self.view addSubview:self.userInput];