iOS,键盘附件

项目需求是这样的:

要搞一个键盘的附件, 查了些资料, 效果如图.

首先, UIResponder 中有两个相关的属性, 其实只用到了inputAccessoryView属性, 在UIResponder中, 这个属性是只读的, 咱们须要在自定义的控制器或者view上, 重写这个属性, @property (nullable, nonatomic, readwrite, strong) UIView *inputAccessoryView;; 而后自定义一个view, 赋值给 inputAccessoryView 属性便可. 这时候, 在定义readwrite的inputAccessoryView属性的UIResponder子类的, 子视图上面, 弹出键盘时候, 键盘会有一个附件. 你能够彻底自定义这个附件.

// Called and presented when object becomes first responder.  Goes up the responder chain.
@property (nullable, nonatomic, readonly, strong) __kindof UIView *inputView NS_AVAILABLE_IOS(3_2);
@property (nullable, nonatomic, readonly, strong) __kindof UIView *inputAccessoryView

这是个人测试代码:

- (void)show {
    [super show];
    [[IQKeyboardManager sharedManager] setEnable:NO];
    
    ESPasswdInputView *passwdInputView = [[ESPasswdInputView alloc] initWithFrame:CGRectZero];
    self.inputAccessoryView = passwdInputView;
    passwdInputView.delegate = self;
    _passwdInputView = passwdInputView;
    
    UITextField *textField = [[UITextField alloc] init];
    [textField becomeFirstResponder];
    [self addSubview:textField];
    
    [passwdInputView show];
}
- (void)dismiss {
    
    [[IQKeyboardManager sharedManager] setEnable:YES];
    [super dismiss];
    [self.passwdInputView dismiss];
    self.passwdInputView = nil;
}

1.首先若是项目中使用了`IQKeyboardManager`, 则最好关闭掉;
2.自定义的inputAccessoryView不能添加到其它图层之上, 不然崩;
3.测试代码中,使用添加到视图上的一个傀儡textField, 目的是换出键盘, 而后让键盘的附件上的textField成为第一响应者.