在IB的库中,介绍告诉我们,当按下返回键时,UITextView的键盘将消失。但实际上返回键只能作为'\n'
我可以添加一个按钮,并使用[txtView resignFirstResponder]隐藏键盘。
但是有没有办法为键盘中的返回键添加动作,这样我就不需要添加UIButton了?
在IB的库中,介绍告诉我们,当按下返回键时,UITextView的键盘将消失。但实际上返回键只能作为'\n'
我可以添加一个按钮,并使用[txtView resignFirstResponder]隐藏键盘。
但是有没有办法为键盘中的返回键添加动作,这样我就不需要添加UIButton了?
当前回答
我的诀窍是:
1-创建一个按钮覆盖整个视图; 2-将它发送到视图的后台, 3-在属性检查器中将它的类型从“圆角矩形”改为“自定义” 4-创建一个动作 5-实施动作方法:
- (IBAction)bgTouched:(id)sender
{
//to dismiss keyboard on bg btn pressed
[_userInput resignFirstResponder];
}
哪里_userInput是你的TextField出口
其他回答
在使用uitextview时还有另一个解决方案, 你可以添加工具栏作为InputAccessoryView在“textViewShouldBeginEditing”,并从这个工具栏的完成按钮,你可以解雇键盘,这是如下代码:
在viewDidLoad
toolBar = [[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, 320, 44)]; //toolbar is uitoolbar object
toolBar.barStyle = UIBarStyleBlackOpaque;
UIBarButtonItem *btnDone = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(btnClickedDone:)];
[toolBar setItems:[NSArray arrayWithObject:btnDone]];
在textviewdelegate方法
- (BOOL)textViewShouldBeginEditing:(UITextView *)textView
{
[textView setInputAccessoryView:toolBar];
return YES;
}
在操作按钮完成,这是在工具栏如下:
-(IBAction)btnClickedDone:(id)sender
{
[self.view endEditing:YES];
}
斯威夫特
func textView(textView: UITextView, shouldChangeTextInRange range: NSRange, replacementText text: String) -> Bool {
if text == "\n" {
textView.resignFirstResponder()
}
return true
}
我想我应该把这个片段放在这里:
确保声明了对UITextViewDelegate协议的支持。
- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {
if([text isEqualToString:@"\n"]) {
[textView resignFirstResponder];
return NO;
}
return YES;
}
Swift 4.0更新:
func textView(_ textView: UITextView, shouldChangeTextIn range: NSRange, replacementText text: String) -> Bool {
if text == "\n" {
textView.resignFirstResponder()
return false
}
return true
}
对于Swift 3,这段代码允许我在UITextView之外按下键来解除键盘。
@IBOutlet weak var comment: UITextView!
override func viewDidLoad() {
super.viewDidLoad()
comment.delegate = self
let tapGestureRecogniser = UITapGestureRecognizer(target: self, action: #selector(tap))
view.addGestureRecognizer(tapGestureRecogniser)
}
func tap(sender: UITapGestureRecognizer) {
if comment.isFirstResponder {
comment.resignFirstResponder()
}
}
就像matt对samvermette的评论一样,我也不喜欢检测“\n”的想法。返回键在UITextView中是有原因的,当然是去下一行。
在我看来,最好的解决方案是模仿iPhone的消息应用程序-这是在键盘上添加工具栏(和按钮)。
我从以下博客文章中得到了代码:
http://www.iosdevnotes.com/2011/02/iphone-keyboard-toolbar/
步骤:
-添加工具栏到你的XIB文件-设置高度为460
-添加工具栏按钮项(如果尚未添加)。如果需要右对齐,还可以将灵活的工具栏按钮项添加到XIB,并移动工具栏按钮项
-创建将按钮项目链接到resignFirstResponder的动作,如下所示:
- (IBAction)hideKeyboard:(id)sender {
[yourUITextView resignFirstResponder];
}
套:
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];
}
- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillHideNotification object:nil];
}
- (void)keyboardWillShow:(NSNotification *)notification {
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.3];
CGRect frame = self.keyboardToolbar.frame;
frame.origin.y = self.view.frame.size.height - 260.0;
self.keyboardToolbar.frame = frame;
[UIView commitAnimations];
}
- (void)keyboardWillHide:(NSNotification *)notification {
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.3];
CGRect frame = self.keyboardToolbar.frame;
frame.origin.y = self.view.frame.size.height;
self.keyboardToolbar.frame = frame;
[UIView commitAnimations];
}