我有一个qazxsw poi，显示了qazxsw poi。 textView的qazxsw poi和UITextView属性都设置为NSAttributedString。
attributionString包含一个URL，我想允许点击URL来打开浏览器。但只有在editable属性设置为selectable时才能与URL进行交互。
如何仅允许用户交互来点击链接，而不是用于选择文本？
我发现摆弄内部手势识别器的概念有点吓人，所以试图寻找另一种解决方案。我发现当用户没有触及内部有链接的文本时，我们可以覆盖false以有效地允许“点击”：
selectable这也意味着如果你有一个true在point(inside:with:)内有一个链接，// Inside a UITextView subclass:
override func point(inside point: CGPoint, with event: UIEvent?) -> Bool {
guard let pos = closestPosition(to: point) else { return false }
guard let range = tokenizer.rangeEnclosingPosition(pos, with: .character, inDirection: .layout(.left)) else { return false }
let startIndex = offset(from: beginningOfDocument, to: range.start)
return attributedText.attribute(.link, at: startIndex, effectiveRange: nil) != nil
}
仍然会在点击文本的非链接部分时被调用:)
Swift 4，Xcode 9.2
下面是链接的不同方法，使UITextView的class HyperlinkEnabledReadOnlyTextView: UITextView {
override init(frame: CGRect, textContainer: NSTextContainer?) {
super.init(frame: frame, textContainer: textContainer)
isEditable = false
isSelectable = false
initHyperLinkDetection()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
isEditable = false
isSelectable = false
initHyperLinkDetection()
}
// MARK: - Prevent interaction except on hyperlinks
// Combining https://stackoverflow.com/a/44878203/2015332 and https://stackoverflow.com/a/49443814/1033581
private var linkGestureRecognizer: UITapGestureRecognizer!
private func initHyperLinkDetection() {
// Native UITextView links gesture recognizers are broken on iOS 11.0-11.1:
// https://stackoverflow.com/questions/46143868/xcode-9-uitextview-links-no-longer-clickable
// So we add our own UITapGestureRecognizer, which moreover detects taps faster than native one
linkGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(textTapped))
linkGestureRecognizer.numberOfTapsRequired = 1
addGestureRecognizer(linkGestureRecognizer)
linkGestureRecognizer.isEnabled = true // because previous call sets it to false
}
override func addGestureRecognizer(_ gestureRecognizer: UIGestureRecognizer) {
// Prevents drag and drop gestures, but also prevents a crash with links on iOS 11.0 and 11.1.
// https://stackoverflow.com/a/49535011/1033581
gestureRecognizer.isEnabled = false
super.addGestureRecognizer(gestureRecognizer)
}
override func point(inside point: CGPoint, with event: UIEvent?) -> Bool {
// Allow only taps located over an hyperlink
var location = point
location.x -= textContainerInset.left
location.y -= textContainerInset.top
guard location.x >= bounds.minX, location.x <= bounds.maxX, location.y >= bounds.minY, location.y <= bounds.maxY else { return false }
let charIndex = layoutManager.characterIndex(for: location, in: textContainer, fractionOfDistanceBetweenInsertionPoints: nil)
return attributedText.attribute(.link, at: charIndex, effectiveRange: nil) != nil
}
@objc private func textTapped(recognizer: UITapGestureRecognizer) {
guard recognizer == linkGestureRecognizer else { return }
var location = recognizer.location(in: self)
location.x -= textContainerInset.left
location.y -= textContainerInset.top
guard location.x >= bounds.minX, location.x <= bounds.maxX, location.y >= bounds.minY, location.y <= bounds.maxY else { return }
let characterIndex = layoutManager.characterIndex(for: location, in: textContainer, fractionOfDistanceBetweenInsertionPoints: nil)
let characterRange = NSRange(location: characterIndex, length: 1)
if let attachment = attributedText?.attribute(.attachment, at: index, effectiveRange: nil) as? NSTextAttachment {
if #available(iOS 10.0, *) {
_ = delegate?.textView?(self, shouldInteractWith: attachment, in: characterRange, interaction: .invokeDefaultAction)
} else {
_ = delegate?.textView?(self, shouldInteractWith: attachment, in: characterRange)
}
}
if let url = attributedText?.attribute(.link, at: characterIndex, effectiveRange: nil) as? URL {
if #available(iOS 10.0, *) {
_ = delegate?.textView?(self, shouldInteractWith: url, in: characterRange, interaction: .invokeDefaultAction)
} else {
_ = delegate?.textView?(self, shouldInteractWith: url, in: characterRange)
}
}
}
}
属性为.attachment
override public var selectedTextRange: UITextRange? {
get {
return nil
}
set {}
}
public init() {
super.init(frame: CGRect.zero, textContainer: nil)
commonInit()
}
required public init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
commonInit()
}
private func commonInit() {
self.tintColor = UIColor.black
self.isScrollEnabled = false
self.delegate = self
self.dataDetectorTypes = []
self.isEditable = false
self.delegate = self
self.font = Style.font(.sansSerif11)
self.delaysContentTouches = true
}
@available(iOS 10.0, *)
public func textView(_ textView: UITextView, shouldInteractWith URL: URL, in characterRange: NSRange, interaction: UITextItemInteraction) -> Bool {
// Handle link
return false
}
public func textView(_ textView: UITextView, shouldInteractWith URL: URL, in characterRange: NSRange) -> Bool {
// Handle link
return false
}
如何使用，
isSelectable这是我如何解决这个问题 - 我使我的可选textview成为一个子类，它覆盖了canPerformAction以返回false。
false我为Objective C做的是创建一个子类并覆盖textViewdidChangeSelection：delegate方法，所以在实现类中：
class TextView: UITextView {
//MARK: Properties
open var didTouchedLink:((URL,NSRange,CGPoint) -> Void)?
override init(frame: CGRect, textContainer: NSTextContainer?) {
super.init(frame: frame, textContainer: textContainer)
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
override func draw(_ rect: CGRect) {
super.draw(rect)
}
open override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
let touch = Array(touches)[0]
if let view = touch.view {
let point = touch.location(in: view)
self.tapped(on: point)
}
}
}
extension TextView {
fileprivate func tapped(on point:CGPoint) {
var location: CGPoint = point
location.x -= self.textContainerInset.left
location.y -= self.textContainerInset.top
let charIndex = layoutManager.characterIndex(for: location, in: self.textContainer, fractionOfDistanceBetweenInsertionPoints: nil)
guard charIndex < self.textStorage.length else {
return
}
var range = NSRange(location: 0, length: 0)
if let attributedText = self.attributedText {
if let link = attributedText.attribute(NSAttributedStringKey.link, at: charIndex, effectiveRange: &range) as? URL {
print("\n\t##-->You just tapped on '\(link)' withRange = \(NSStringFromRange(range))\n")
self.didTouchedLink?(link, range, location)
}
}
}
}
. . . . . . .
let textView = TextView()//Init your textview and assign attributedString and other properties you want.
textView.didTouchedLink = { (url,tapRange,point) in
//here goes your other logic for successfull URL location
}
别忘了设置self.delegate = self
这是一个Swift 4解决方案，允许点击通过，除非按下链接;
在父视图中
class CustomTextView: UITextView {
override public func canPerformAction(_ action: Selector, withSender sender: Any?) -> Bool {
return false
}
}
自定义UITextView
#import "CustomTextView.h"
@interface CustomTextView()<UITextViewDelegate>
@end
@implementation CustomTextView
Swift 4.2
简单
- (void) textViewDidChangeSelection:(UITextView *)textView
{
UITextRange *selectedRange = [textView selectedTextRange];
NSString *selectedText = [textView textInRange:selectedRange];
if (selectedText.length > 1 && selectedText.length < textView.text.length)
{
textView.selectedRange = NSMakeRange(0, 0);
}
}
正如Cœur所说，你可以继承UITextView，重写UITableViewCell的方法，将其设置为nil。链接仍然可以点击，但您将无法选择其余文本。
tableView(didSelectRowAt:)经过一些研究，我已经找到了解决方案。这是一个黑客，我不知道它是否会在未来的iOS版本中运行，但它现在正在运行（iOS 9.3）。
只需添加此UITextView类别（Gist selectedTextRange）：
class CustomTextView: UITextView {
override public var selectedTextRange: UITextRange? {
get {
return nil
}
set { }
}
您可以通过继承UITextView并禁止可以选择某些内容的手势来禁用文本选择。
以下解决方案是：
here
原生UITextView链接手势识别器在iOS 11.0-11.1上被破坏，需要一个小的延迟长按而不是点击：@implementation UITextView (NoFirstResponder)
- (void)addGestureRecognizer:(UIGestureRecognizer *)gestureRecognizer {
if ([gestureRecognizer isKindOfClass:[UILongPressGestureRecognizer class]]) {
@try {
id targetAndAction = ((NSMutableArray *)[gestureRecognizer valueForKey:@"_targets"]).firstObject;
NSArray <NSString *>*actions = @[@"action=loupeGesture:", // link: no, selection: shows circle loupe and blue selectors for a second
@"action=longDelayRecognizer:", // link: no, selection: no
/*@"action=smallDelayRecognizer:", // link: yes (no long press), selection: no*/
@"action=oneFingerForcePan:", // link: no, selection: shows rectangular loupe for a second, no blue selectors
@"action=_handleRevealGesture:"]; // link: no, selection: no
for (NSString *action in actions) {
if ([[targetAndAction description] containsString:action]) {
[gestureRecognizer setEnabled:false];
}
}
}
@catch (NSException *e) {
}
@finally {
[super addGestureRecognizer: gestureRecognizer];
}
}
}
您可以使用自己的手势识别器正确支持链接，并且可以通过继承UITextView并禁止可以选择内容或点击某些内容的手势来禁用文本选择。
以下解决方案将禁止选择，并且是：
/// Class to allow links but no selection.
/// Basically, it disables unwanted UIGestureRecognizer from UITextView.
/// https://stackoverflow.com/a/49443814/1033581
class UnselectableTappableTextView: UITextView {
// required to prevent blue background selection from any situation
override var selectedTextRange: UITextRange? {
get { return nil }
set {}
}
override func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool {
if gestureRecognizer is UIPanGestureRecognizer {
// required for compatibility with isScrollEnabled
return super.gestureRecognizerShouldBegin(gestureRecognizer)
}
if let tapGestureRecognizer = gestureRecognizer as? UITapGestureRecognizer,
tapGestureRecognizer.numberOfTapsRequired == 1 {
// required for compatibility with links
return super.gestureRecognizerShouldBegin(gestureRecognizer)
}
// allowing smallDelayRecognizer for links
// https://stackoverflow.com/questions/46143868/xcode-9-uitextview-links-no-longer-clickable
if let longPressGestureRecognizer = gestureRecognizer as? UILongPressGestureRecognizer,
// comparison value is used to distinguish between 0.12 (smallDelayRecognizer) and 0.5 (textSelectionForce and textLoupe)
longPressGestureRecognizer.minimumPressDuration < 0.325 {
return super.gestureRecognizerShouldBegin(gestureRecognizer)
}
// preventing selection from loupe/magnifier (_UITextSelectionForceGesture), multi tap, tap and a half, etc.
gestureRecognizer.isEnabled = false
return false
}
}
这是Max Chuquimia发布的答案的Objective C版本。
Xcode 9 UITextView links no longer clickable
通过@Lukas获得上述Objective-C版本
UITextView这对我有用：
/// Class to support links and to disallow selection.
/// It disables most UIGestureRecognizer from UITextView and adds a UITapGestureRecognizer.
/// https://stackoverflow.com/a/49443814/1033581
class UnselectableTappableTextView: UITextView {
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
// Native UITextView links gesture recognizers are broken on iOS 11.0-11.1:
// https://stackoverflow.com/questions/46143868/xcode-9-uitextview-links-no-longer-clickable
// So we add our own UITapGestureRecognizer.
linkGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(textTapped))
linkGestureRecognizer.numberOfTapsRequired = 1
addGestureRecognizer(linkGestureRecognizer)
linkGestureRecognizer.isEnabled = true
}
var linkGestureRecognizer: UITapGestureRecognizer!
// required to prevent blue background selection from any situation
override var selectedTextRange: UITextRange? {
get { return nil }
set {}
}
override func addGestureRecognizer(_ gestureRecognizer: UIGestureRecognizer) {
// Prevents drag and drop gestures,
// but also prevents a crash with links on iOS 11.0 and 11.1.
// https://stackoverflow.com/a/49535011/1033581
gestureRecognizer.isEnabled = false
super.addGestureRecognizer(gestureRecognizer)
}
override func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool {
if gestureRecognizer == linkGestureRecognizer {
// Supporting links correctly.
return super.gestureRecognizerShouldBegin(gestureRecognizer)
}
if gestureRecognizer is UIPanGestureRecognizer {
// Compatibility support with isScrollEnabled.
return super.gestureRecognizerShouldBegin(gestureRecognizer)
}
// Preventing selection gestures and disabling broken links support.
gestureRecognizer.isEnabled = false
return false
}
@objc func textTapped(recognizer: UITapGestureRecognizer) {
guard recognizer == linkGestureRecognizer else {
return
}
var location = recognizer.location(in: self)
location.x -= textContainerInset.left
location.y -= textContainerInset.top
let characterIndex = layoutManager.characterIndex(for: location, in: textContainer, fractionOfDistanceBetweenInsertionPoints: nil)
let characterRange = NSRange(location: characterIndex, length: 1)
if let attachment = attributedText?.attribute(.attachment, at: index, effectiveRange: nil) as? NSTextAttachment {
if #available(iOS 10.0, *) {
_ = delegate?.textView?(self, shouldInteractWith: attachment, in: characterRange, interaction: .invokeDefaultAction)
} else {
_ = delegate?.textView?(self, shouldInteractWith: attachment, in: characterRange)
}
}
if let url = attributedText?.attribute(.link, at: index, effectiveRange: nil) as? URL {
if #available(iOS 10.0, *) {
_ = delegate?.textView?(self, shouldInteractWith: url, in: characterRange, interaction: .invokeDefaultAction)
} else {
_ = delegate?.textView?(self, shouldInteractWith: url, in: characterRange)
}
}
}
}
我最终结合了- (BOOL) pointInside:(CGPoint)point withEvent:(UIEvent *)event
{
UITextPosition *position = [self closestPositionToPoint:point];
if (!position) {
return NO;
}
UITextRange *range = [self.tokenizer rangeEnclosingPosition:position
withGranularity:UITextGranularityCharacter
inDirection:UITextLayoutDirectionLeft];
if (!range) {
return NO;
}
NSInteger startIndex = [self offsetFromPosition:self.beginningOfDocument
toPosition:range.start];
return [self.attributedText attribute:NSLinkAttributeName
atIndex:startIndex
effectiveRange:nil] != nil;
}
和extension UITextView {
override open func addGestureRecognizer(_ gestureRecognizer: UIGestureRecognizer) {
if gestureRecognizer.isKind(of: UILongPressGestureRecognizer.self) {
do {
let array = try gestureRecognizer.value(forKey: "_targets") as! NSMutableArray
let targetAndAction = array.firstObject
let actions = ["action=oneFingerForcePan:",
"action=_handleRevealGesture:",
"action=loupeGesture:",
"action=longDelayRecognizer:"]
for action in actions {
print("targetAndAction.debugDescription: \(targetAndAction.debugDescription)")
if targetAndAction.debugDescription.contains(action) {
gestureRecognizer.isEnabled = false
}
}
} catch let exception {
print("TXT_VIEW EXCEPTION : \(exception)")
}
defer {
super.addGestureRecognizer(gestureRecognizer)
}
}
}
}
（iOS <11变体）的解决方案。这按预期工作：一个只读，不可选择的UITextView，超链接仍在其中工作。 Coeur解决方案的一个优点是触摸检测是即时的，不显示高亮，也不允许拖放链接。
这是结果代码：
@interface MessageTextView : UITextView <UITextViewDelegate>
@end
@implementation MessageTextView
-(void)awakeFromNib{
[super awakeFromNib];
self.delegate = self;
}
- (BOOL)canBecomeFirstResponder {
return NO;
}
- (void)textViewDidChangeSelection:(UITextView *)textView
{
textView.selectedTextRange = nil;
[textView endEditing:YES];
}
@end
请注意，我在编译https://stackoverflow.com/a/44878203/2015332枚举时遇到了一些问题，因为我没有使用它，所以我删除了它。
像下面一样覆盖UITextView并使用它来呈现可保存的html样式的可点击链接。
公共类LinkTextView：UITextView {
https://stackoverflow.com/a/49443814/2015332
}