添加一个按钮隐藏键盘

Question

在一个UITextView隐藏键盘，有方法：

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

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

} 

，但如果我要离开按钮“做”到“回归”，并添加一个按钮隐藏键盘，我该怎么办？

Answer 1

您可以指定一个工具栏，其中包含一个用于取消键盘的按钮，即文本框的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

这可以做的更容易！

我在IB做了一个自定义视图，在我viewController.h我只是做了一个IBOutlet UIView *accessoryView;，连接他们和- (IBAction)dismissKeyboard;

我把视图中的工具栏与完成按钮，做出了IBAction为连接一个写道： [textView resignFirstResponder]和

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

但实际上，看起来有点怪怪的和非苹果风格的...有一个想法？

Answer 3

雨燕2.0的版本：

//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 

斯威夫特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 Documentation

'inputAccessoryView' documentation