添加隐藏键盘的按钮

Question

在 UITextView 上隐藏键盘有一个方法：

...
    textfield.returnKeyType = UIReturnKeyDone;
    textfield.delegate = self;
....

-(BOOL)textFieldShouldReturn:(UITextField *)textField {
    [textField resignFirstResponder];
    return YES;

}

但是如果我想将“完成”按钮保留到“返回”并添加一个按钮来隐藏键盘，我该怎么办？

Answer 1

您可以分配一个带有按钮的工具栏，该按钮可将键盘关闭为文本字段的 inputAccessoryView。一个简单的例子是，

UIBarButtonItem *barButton = [[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:textField action:@selector(resignFirstResponder)] autorelease];
UIToolbar *toolbar = [[[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 320, 44)] autorelease];
toolbar.items = [NSArray arrayWithObject:barButton];

textField.inputAccessoryView = toolbar;

Answer 2

Swift 2.0 版本：

//Declared at top of view controller
var accessoryDoneButton: UIBarButtonItem!
let accessoryToolBar = UIToolbar(frame: CGRectMake(0,0,UIScreen.mainScreen().bounds.width, 44))
//Could also be an IBOutlet, I just happened to have it like this
let codeInput = UITextField()

//Configured in viewDidLoad()
self.accessoryDoneButton = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.Done, target: self, action: #selector(self.donePressed(_:)))
self.accessoryToolBar.items = [self.accessoryDoneButton]
self.codeInput.inputAccessoryView = self.accessoryToolBar

Swift 4：

//Declared at top of view controller
var accessoryDoneButton: UIBarButtonItem!
let accessoryToolBar = UIToolbar(frame: CGRect(x: 0, y: 0, width: UIScreen.main.bounds.width, height: 44))
//Could also be an IBOutlet, I just happened to have it like this
let codeInput = UITextField()

//Configured in viewDidLoad()
self.accessoryDoneButton = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.done, target: self, action: #selector(self.donePressed))
self.accessoryToolBar.items = [self.accessoryDoneButton]
self.codeInput.inputAccessoryView = self.accessoryToolBar

func donePressed() {
    //Causes the view (or one of its embedded text fields) to resign the first responder status.
    view.endEditing(true)
}

UIToolBar 文档

'inputAccessoryView'文档

Answer 3

这可以更容易地完成！

我在 IB 中创建了一个自定义视图，在 viewController.h 中，我刚刚创建了一个 IBOutlet UIView *accessoryView;，将它们连接起来并

添加 了一个 - (IBAction)dismissKeyboard;查看带有完成按钮的工具栏，与 IBAction 建立连接并写道：
[textView resignFirstResponder] 但

- (void)viewDidLoad
{
    textView.inputAccessoryView = accessoryView;
    [super viewDidLoad];
}

实际上这看起来有点奇怪并且非苹果风格......有什么想法吗？