我希望 a UITextField
(或者理想情况下是 a UILabel
)中的文本是non-editable,但同时让用户能够将其复制到其他地方粘贴。
问问题
24466 次
6 回答
25
我的最终解决方案如下:
我创建了一个 UILabel 的子类(UITextField 应该工作相同),它在被点击后显示一个 UIMenuController。CopyableLabel.m 看起来像这样:
@implementation CopyableLabel
- (BOOL)canPerformAction:(SEL)action withSender:(id)sender {
if(action == @selector(copy:)) {
return YES;
}
else {
return [super canPerformAction:action withSender:sender];
}
}
- (BOOL)canBecomeFirstResponder {
return YES;
}
- (BOOL)becomeFirstResponder {
if([super becomeFirstResponder]) {
self.highlighted = YES;
return YES;
}
return NO;
}
- (void)copy:(id)sender {
UIPasteboard *board = [UIPasteboard generalPasteboard];
[board setString:self.text];
self.highlighted = NO;
[self resignFirstResponder];
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
if([self isFirstResponder]) {
self.highlighted = NO;
UIMenuController *menu = [UIMenuController sharedMenuController];
[menu setMenuVisible:NO animated:YES];
[menu update];
[self resignFirstResponder];
}
else if([self becomeFirstResponder]) {
UIMenuController *menu = [UIMenuController sharedMenuController];
[menu setTargetRect:self.bounds inView:self];
[menu setMenuVisible:YES animated:YES];
}
}
@end
于 2010-01-30T14:27:22.783 回答
6
这个问题已经很老了,我很惊讶没有人发布没有子类化的解决方案。@mrueg 的答案中提出的想法是正确的,但您不需要对任何东西进行子类化。我刚刚遇到了这个问题并像这样解决了它:
在我的视图控制器中:
- (void)viewDidLoad {
self.textField.delegate = self;
self.textField.text = @"Copyable, non-editable string.";
}
- (BOOL)canBecomeFirstResponder {
return YES;
}
- (void)copyTextFieldContent:(id)sender {
UIPasteboard* pb = [UIPasteboard generalPasteboard];
pb.string = self.textField.text;
}
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField {
// UIKit changes the first responder after this method, so we need to show the copy menu after this method returns.
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.3*NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
[self becomeFirstResponder];
UIMenuController* menuController = [UIMenuController sharedMenuController];
UIMenuItem* copyItem = [[UIMenuItem alloc] initWithTitle:@"Copy"
action:@selector(copyTextFieldContent:)];
menuController.menuItems = @[copyItem];
CGRect selectionRect = textField.frame;
[menuController setTargetRect:selectionRect inView:self.view];
[menuController setMenuVisible:YES animated:YES];
});
return NO;
}
如果你想让它为 a 工作UILabel
,它应该以相同的方式工作,只需添加一个点击手势识别器而不是使用委托方法。
于 2015-07-17T22:09:37.703 回答
5
这将完成您需要的一切。将是可复制的。但不可编辑,不会显示键盘或光标。
class ViewController: UIViewController {
@IBOutlet weak var copyableUneditableTextfield: UITextField!
override func viewDidLoad() {
super.viewDidLoad()
copyableUneditableTextfield.delegate = self
copyableUneditableTextfield.inputView = UIView() //prevents keyboard
copyableUneditableTextfield.tintColor = .clear //prevents cursor
copyableUneditableTextfield.text = "Some Text You Want User To Copy But Not Edit"
}
}
extension ViewController: UITextFieldDelegate {
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
return false //prevents editing
}
}
于 2017-03-23T06:06:54.703 回答
3
试试UITextView
吧(我怀疑它会像UILabel
你一样工作)。我将其editable
属性设置为进行了测试NO
,双击复制对我有用。
于 2009-12-17T10:49:05.880 回答
1
另一种解决方案是保持UITextField
启用但以编程方式防止它被编辑。这是通过以下委托方法完成的:
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
return NO;
}
我不知道可能的限制,目前适合我的需要。
于 2014-01-18T13:18:40.320 回答
0
下面的代码救了我。
textField.addTarget(target, action: "textFieldEditingDidEndAction:", forControlEvents: [.EditingDidEnd])
这似乎Paste
是一个单一且完整的编辑事件。
于 2016-03-17T09:19:51.183 回答