如何将UITextRange
对象转换为NSRange
?我看过很多关于走向另一个方向的帖子,但这与我所需要的相反。我正在使用UITextRange
selectedTextRange
which 是 a 的属性UITextView
。它返回 aUITextRange
但我需要一个范围。
问问题
17646 次
4 回答
58
你需要这样的东西:
- (NSRange) selectedRangeInTextView:(UITextView*)textView
{
UITextPosition* beginning = textView.beginningOfDocument;
UITextRange* selectedRange = textView.selectedTextRange;
UITextPosition* selectionStart = selectedRange.start;
UITextPosition* selectionEnd = selectedRange.end;
const NSInteger location = [textView offsetFromPosition:beginning toPosition:selectionStart];
const NSInteger length = [textView offsetFromPosition:selectionStart toPosition:selectionEnd];
return NSMakeRange(location, length);
}
于 2014-01-15T22:52:22.203 回答
19
这是基于 Vitaly S 回答的 Swift 扩展。
extension UITextInput {
var selectedRange: NSRange? {
guard let range = self.selectedTextRange else { return nil }
let location = offsetFromPosition(beginningOfDocument, toPosition: range.start)
let length = offsetFromPosition(range.start, toPosition: range.end)
return NSRange(location: location, length: length)
}
}
斯威夫特 4
extension UITextInput {
var selectedRange: NSRange? {
guard let range = selectedTextRange else { return nil }
let location = offset(from: beginningOfDocument, to: range.start)
let length = offset(from: range.start, to: range.end)
return NSRange(location: location, length: length)
}
}
于 2016-08-06T14:02:04.490 回答
8
UITextView
有财产
@property(nonatomic) NSRange selectedRange;
于 2014-06-17T12:07:18.160 回答
1
斯威夫特 5
extension UITextInput
{
var selectedRange: NSRange?
{
if let selectedRange = self.selectedTextRange
{
return NSMakeRange(self.offset(from: self.beginningOfDocument, to: selectedRange.start),
self.offset(from: selectedRange.start, to: selectedRange.end))
}
else
{
return nil
}
}
}
于 2020-08-24T06:44:28.120 回答