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
迅速回答:
override func viewDidLoad() {
super.viewDidLoad()
let tapGestureReconizer = UITapGestureRecognizer(target: self, action: "tap:")
view.addGestureRecognizer(tapGestureReconizer)
}
func tap(sender: UITapGestureRecognizer) {
view.endEditing(true)
}
其他回答
//你可以使用这个…
步骤1。第一步是确保声明了对UITextViewDelegate协议的支持。这是在你的头文件中完成的,例如这里的头文件叫做
EditorController。h:
@interface EditorController : UIViewController {
UITextView *messageTextView;
}
@property (nonatomic, retain) UITextView *messageTextView;
@end
步骤2。接下来你需要将控制器注册为UITextView的委托。从上面的例子继续,这里是我如何用EditorController作为委托初始化UITextView…
- (id) init {
if (self = [super init]) {
// define the area and location for the UITextView
CGRect tfFrame = CGRectMake(10, 10, 300, 100);
messageTextView = [[UITextView alloc] initWithFrame:tfFrame];
// make sure that it is editable
messageTextView.editable = YES;
// add the controller as the delegate
messageTextView.delegate = self;
}
步骤3。现在拼图的最后一块是采取行动响应shouldCahngeTextInRange消息如下:
- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range
replacementText:(NSString *)text
{
// Any new character added is passed in as the "text" parameter
if ([text isEqualToString:@"\n"]) {
// Be sure to test for equality using the "isEqualToString" message
[textView resignFirstResponder];
// Return FALSE so that the final '\n' character doesn't get added
return FALSE;
}
// For any other character return TRUE so that the text gets added to the view
return TRUE;
}
-(BOOL)textFieldShouldReturn:(UITextField *)textField; // called from textfield (keyboard)
-(BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text; // good tester function - thanks
你应该添加UIToolbar到顶部UITextView,而不是使用shouldChangeTextIn
在Swift 4中
let toolbar = UIToolbar(frame: CGRect(x: 0, y: 0, width: UIScreen.main.bounds.width, height: 50))
toolbar.barStyle = .default
toolbar.items = [
UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: nil, action: nil),
UIBarButtonItem(title: "Done", style: .done, target: self, action: #selector(doneAction))
]
textView.inputAccessoryView = toolbar
@objc func doneAction(){
self.textView.resignFirstResponder()
}
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
}
斯威夫特
func textView(textView: UITextView, shouldChangeTextInRange range: NSRange, replacementText text: String) -> Bool {
if text == "\n" {
textView.resignFirstResponder()
}
return true
}