iOS中键盘 KeyBoard 上添加工具栏的方法

UIView * _toolView; //工具栏 
UITextField *textField;// 输入框 呼出键盘用 

- (void)viewDidLoad { 
 [super viewDidLoad]; 
 // Do any additional setup after loading the view, typically from a nib. 
 textField = [[UITextField alloc]initWithFrame:CGRectMake(10, 64, 120, 60)]; 
 textField.placeholder = @"测试"; 
 [self.view addSubview:textField]; 
 //增加监听，当键盘出现或改变时收出消息 
 [[NSNotificationCenter defaultCenter] addObserver:self 
            selector:@selector(keyboardWillShow:) 
             name:UIKeyboardWillShowNotification 
            object:nil]; 
 //增加监听，当键退出时收出消息 
 [[NSNotificationCenter defaultCenter] addObserver:self 
            selector:@selector(keyboardWillHide:) 
             name:UIKeyboardWillHideNotification object:nil]; 
 //初始化工具栏 
 _toolView = [[UIView alloc]init]; 
 _toolView.frame = CGRectMake(0, screen_Height, screen_Width, 50); 
 [self.view addSubview:_toolView]; 
 UIButton *losebtn = [UIButton buttonWithType:UIButtonTypeCustom]; 
 losebtn.frame = CGRectMake(20, 0, 50, 50); 
 [losebtn addTarget:self action:@selector(btnClick) forControlEvents:UIControlEventTouchUpInside]; 
 [losebtn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal]; 
 [losebtn setTitle:@"收起" forState:UIControlStateNormal]; 
 [_toolView addSubview:losebtn]; 
 UIButton *imageBtn = [UIButton buttonWithType:UIButtonTypeCustom]; 
 [imageBtn setTitle:@"图片" forState:UIControlStateNormal]; 
 imageBtn.frame = CGRectMake(screen_Width-100, 0, 50, 50); 
 [imageBtn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal]; 
 [imageBtn addTarget:self action:@selector(imageBtnClick) forControlEvents:UIControlEventTouchUpInside]; 
 [_toolView addSubview:imageBtn]; 
 UIButton *cameraBtn = [UIButton buttonWithType:UIButtonTypeCustom]; 
 [cameraBtn setTitle:@"相机" forState:UIControlStateNormal]; 
 cameraBtn.frame = CGRectMake(screen_Width-50, 0, 50, 50); 
 [cameraBtn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal]; 
 [cameraBtn addTarget:self action:@selector(cameraBtnClick) forControlEvents:UIControlEventTouchUpInside]; 
 [_toolView addSubview:cameraBtn]; 
 UIButton *canclebtn = [UIButton buttonWithType:UIButtonTypeCustom]; 
 [canclebtn setTitle:@"取消" forState:UIControlStateNormal]; 
 canclebtn.frame = CGRectMake(screen_Width-150, 0, 50, 50); 
 [canclebtn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal]; 
 [canclebtn addTarget:self action:@selector(canclebtnBtnClick) forControlEvents:UIControlEventTouchUpInside]; 
 [_toolView addSubview:canclebtn]; 
} 

#pragma mark 当键盘出现或改变时调用 
- (void)keyboardWillShow:(NSNotification *)aNotification 
{ 
 //键盘弹出时显示工具栏 
 //获取键盘的高度 
 NSDictionary *userInfo = [aNotification userInfo]; 
 NSValue *aValue = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey]; 
 CGRect keyboardRect = [aValue CGRectValue]; 
 float keyBoardHeight = keyboardRect.size.height; 
 // NSLog(@"%ld",(long)keyBoardHeight); 
 [UIView animateWithDuration:0.1 animations:^{ 
  _toolView.frame = CGRectMake(0, screen_Height-keyBoardHeight-50, screen_Width, 50); 
 }]; 
} 
#pragma mark 当键退出时调用 
- (void)keyboardWillHide:(NSNotification *)aNotification 
{ 
 //键盘消失时 隐藏工具栏 
 [UIView animateWithDuration:0.1 animations:^{ 
  _toolView.frame = CGRectMake(0, screen_Height+50, screen_Width, 50); 
 }]; 
} 

- (void)btnClick{ 
 [textField resignFirstResponder]; 
} 
- (void)imageBtnClick{ 
} 
- (void)cameraBtnClick{ 
} 
- (void)canclebtnBtnClick{ 
} 

UIToolbar *keyboardDoneButtonView = [[UIToolbar alloc] init];
[keyboardDoneButtonView sizeToFit];
UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithTitle:@"Done"
                style:UIBarButtonItemStyleBordered target:self
                action:@selector(doneClicked:)];
[keyboardDoneButtonView setItems:[NSArray arrayWithObjects:doneButton, nil]];
txtField.inputAccessoryView = keyboardDoneButtonView;