关于IOS-判断显示的哪个键盘

使用textField的inputAccessoryView属性：

txtfld.keyboardType=UIKeyboardTypeDecimalPad;
txtfld.inputAccessoryView=[self toolBarForKeyboardAccessory];

然后：

    -(UIToolbar *)toolBarForKeyboardAccessory
    {
     UIToolbar *keyboardToolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, 44)];
     keyboardToolbar.barStyle = UIBarStyleDefault;

    UIBarButtonItem* flexSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];


UIBarButtonItem* cancelButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:@selector(cancelButtonClicked:)];
 CGRect rect = CGRectMake(1, 5.0, 250, 30);
KeyboardTextField = [[UITextField alloc] initWithFrame:rect];
KeyboardTextField.borderStyle = UITextBorderStyleRoundedRect;
KeyboardTextField.font = [UIFont systemFontOfSize:17.0];
KeyboardTextField.delegate = self;

 UIBarButtonItem *textFieldItem = [[UIBarButtonItem alloc] initWithCustomView:KeyboardTextField] ;

[keyboardToolbar setItems:[NSArray arrayWithObjects: flexSpace,textFieldItem,flexSpace, cancelButton,flexSpace, nil] animated:NO];

return keyboardToolbar;
}