在iOS中的UITextView中检测属性文本上的点击
我有一个在iOS中的UITextView中检测属性文本上的点击,ios,objective-c,uitextview,textkit,Ios,Objective C,Uitextview,Textkit,我有一个UITextView，它显示一个NSAttributedString。这个字符串包含我想使之可点击的单词，这样当它们被点击时，我会被回调，以便我可以执行操作。我意识到，UITextView可以检测到对URL的点击并回调我的代理，但这些不是URL 在我看来，使用iOS 7和TextKit的强大功能，现在应该可以做到这一点了，但是我找不到任何例子，也不知道从哪里开始 我知道现在可以在字符串中创建自定义属性（尽管我还没有这样做），也许这些属性对于检测是否有一个神奇的单词被点击会很有用？在任何情
UITextViewNSAttributedStringUITextView请注意，iOS 6兼容性不是必需的。可以使用。它的工作原理与您想要的有所不同——您必须测试一个被点击的角色是否属于一个神奇的单词。但这并不复杂 顺便说一句，我强烈建议观看《2013年世界野生动植物保护公约》中的文本工具包介绍。:
NSLayoutManager*layoutManager=textView.layoutManager；
CGPoint位置=[触摸位置视图：文本视图]；
NSU整数特征索引；
characterIndex=[layoutManager CharacterIndexorPoint:位置
inTextContainer:textView.textContainer
插入点之间距离的分位数：NULL]；
如果（characterIndexNSAttributedString* attributedString = [[NSAttributedString alloc] initWithString:@"a clickable word" attributes:@{ @"myCustomTag" : @(YES) }];
[paragraph appendAttributedString:attributedString];
- (void)textTapped:(UITapGestureRecognizer *)recognizer
{
UITextView *textView = (UITextView *)recognizer.view;
// Location of the tap in text-container coordinates
NSLayoutManager *layoutManager = textView.layoutManager;
CGPoint location = [recognizer locationInView:textView];
location.x -= textView.textContainerInset.left;
location.y -= textView.textContainerInset.top;
// Find the character that's been tapped on
NSUInteger characterIndex;
characterIndex = [layoutManager characterIndexForPoint:location
inTextContainer:textView.textContainer
fractionOfDistanceBetweenInsertionPoints:NULL];
if (characterIndex < textView.textStorage.length) {
NSRange range;
id value = [textView.attributedText attribute:@"myCustomTag" atIndex:characterIndex effectiveRange:&range];
// Handle as required...
NSLog(@"%@, %d, %d", value, range.location, range.length);
}
}
-（void）text点击：（UITapGestureRecognitor*）识别器
{
UITextView*textView=（UITextView*）识别器.view；
//点击在文本容器坐标中的位置
NSLayoutManager*layoutManager=textView.layoutManager；
CGPoint位置=[识别器位置视图：文本视图]；
location.x-=textView.textContainerSet.left；
location.y-=textView.textContainerSet.top；
//找到被点击的角色
NSU整数特征索引；
characterIndex=[layoutManager CharacterIndexorPoint:位置
inTextContainer:textView.textContainer
插入点之间距离的分位数：NULL]；
if（characterIndex当你知道怎么做的时候，就这么容易了 这是一个稍加修改的版本，基于@tarmes answer。如果没有下面的调整，我无法使
值nulltextView.textStoragetextView.attributedText NSDictionary *attributesOfTappedText = [textView.textStorage attributesAtIndex:characterIndex effectiveRange:&range];
- (void)viewDidLoad
{
[super viewDidLoad];
self.textView.attributedText = [self attributedTextViewString];
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(textTapped:)];
[self.textView addGestureRecognizer:tap];
}
- (NSAttributedString *)attributedTextViewString
{
NSMutableAttributedString *paragraph = [[NSMutableAttributedString alloc] initWithString:@"This is a string with " attributes:@{NSForegroundColorAttributeName:[UIColor blueColor]}];
NSAttributedString* attributedString = [[NSAttributedString alloc] initWithString:@"a tappable string"
attributes:@{@"tappable":@(YES),
@"networkCallRequired": @(YES),
@"loadCatPicture": @(NO)}];
NSAttributedString* anotherAttributedString = [[NSAttributedString alloc] initWithString:@" and another tappable string"
attributes:@{@"tappable":@(YES),
@"networkCallRequired": @(NO),
@"loadCatPicture": @(YES)}];
[paragraph appendAttributedString:attributedString];
[paragraph appendAttributedString:anotherAttributedString];
return [paragraph copy];
}
- (void)textTapped:(UITapGestureRecognizer *)recognizer
{
UITextView *textView = (UITextView *)recognizer.view;
// Location of the tap in text-container coordinates
NSLayoutManager *layoutManager = textView.layoutManager;
CGPoint location = [recognizer locationInView:textView];
location.x -= textView.textContainerInset.left;
location.y -= textView.textContainerInset.top;
NSLog(@"location: %@", NSStringFromCGPoint(location));
// Find the character that's been tapped on
NSUInteger characterIndex;
characterIndex = [layoutManager characterIndexForPoint:location
inTextContainer:textView.textContainer
fractionOfDistanceBetweenInsertionPoints:NULL];
if (characterIndex < textView.textStorage.length) {
NSRange range;
NSDictionary *attributes = [textView.textStorage attributesAtIndex:characterIndex effectiveRange:&range];
NSLog(@"%@, %@", attributes, NSStringFromRange(range));
//Based on the attributes, do something
///if ([attributes objectForKey:...)] //make a network call, load a cat Pic, etc
}
}
-（void）viewDidLoad
{
[超级视图下载]；
self.textView.attributedText=[self attributedTextViewString]；
UITapGestureRecognizer*点击=[[UITapGestureRecognizer alloc]initWithTarget:self action:@selector（textTapped:）]；
[self.textView AddGestureRecognitor:点击]；
}
-（NSAttributedString*）attributedTextViewString
{
NSMUTABLeAttributeString*段落=[[NSMUTABLeAttributeString alloc]initWithString:@“这是一个具有以下属性的字符串：@{NSForegroundColorAttributeName:[UIColor blueColor]}]；
NSAttributedString*attributedString=[[NSAttributedString alloc]initWithString:@“一个可点击的字符串”
属性：@{@“可点击”：@（是），
@“networkCallRequired”：@（是），
@“loadCatPicture”：（否）}]；
NSAttributedString*另一个AttributedString=[[NSAttributedString alloc]initWithString:@“和另一个可点击字符串”
属性：@{@“可点击”：@（是），
@“networkCallRequired”：@（否），
@“loadCatPicture”：@（是）}]；
[段落AppendAttributeString:AttributeString]；
[段落appendAttributedString:另一个AttributedString]；
返回[段落副本]；
}
-（无效）文本点击：（UITapGestureRecognizer*）识别器
{
UITextView*textView=（UITextView*）识别器.view；
//点击在文本容器坐标中的位置
NSLayoutManager*layoutManager=textView.layoutManager；
CGPoint位置=[识别器位置视图：文本视图]；
location.x-=textView.textContainerSet.left；
location.y-=textView.textContainerSet.top；
NSLog（@“位置：%@”，NSStringFromCGPoint（位置））；
//找到被点击的角色
NSU整数特征索引；
characterIndex=[layoutManager字符
- (void)viewDidLoad
{
[super viewDidLoad];
self.textView.attributedText = [self attributedTextViewString];
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(textTapped:)];
[self.textView addGestureRecognizer:tap];
}
- (NSAttributedString *)attributedTextViewString
{
NSMutableAttributedString *paragraph = [[NSMutableAttributedString alloc] initWithString:@"This is a string with " attributes:@{NSForegroundColorAttributeName:[UIColor blueColor]}];
NSAttributedString* attributedString = [[NSAttributedString alloc] initWithString:@"a tappable string"
attributes:@{@"tappable":@(YES),
@"networkCallRequired": @(YES),
@"loadCatPicture": @(NO)}];
NSAttributedString* anotherAttributedString = [[NSAttributedString alloc] initWithString:@" and another tappable string"
attributes:@{@"tappable":@(YES),
@"networkCallRequired": @(NO),
@"loadCatPicture": @(YES)}];
[paragraph appendAttributedString:attributedString];
[paragraph appendAttributedString:anotherAttributedString];
return [paragraph copy];
}
- (void)textTapped:(UITapGestureRecognizer *)recognizer
{
UITextView *textView = (UITextView *)recognizer.view;
// Location of the tap in text-container coordinates
NSLayoutManager *layoutManager = textView.layoutManager;
CGPoint location = [recognizer locationInView:textView];
location.x -= textView.textContainerInset.left;
location.y -= textView.textContainerInset.top;
NSLog(@"location: %@", NSStringFromCGPoint(location));
// Find the character that's been tapped on
NSUInteger characterIndex;
characterIndex = [layoutManager characterIndexForPoint:location
inTextContainer:textView.textContainer
fractionOfDistanceBetweenInsertionPoints:NULL];
if (characterIndex < textView.textStorage.length) {
NSRange range;
NSDictionary *attributes = [textView.textStorage attributesAtIndex:characterIndex effectiveRange:&range];
NSLog(@"%@, %@", attributes, NSStringFromRange(range));
//Based on the attributes, do something
///if ([attributes objectForKey:...)] //make a network call, load a cat Pic, etc
}
}
- (void)tappedTextView:(UITapGestureRecognizer *)tapGesture {
if (tapGesture.state != UIGestureRecognizerStateEnded) {
return;
}
UITextView *textView = (UITextView *)tapGesture.view;
CGPoint tapLocation = [tapGesture locationInView:textView];
NSDataDetector *detector = [NSDataDetector dataDetectorWithTypes:NSTextCheckingTypeLink|NSTextCheckingTypePhoneNumber
error:nil];
NSArray* resultString = [detector matchesInString:self.txtMessage.text options:NSMatchingReportProgress range:NSMakeRange(0, [self.txtMessage.text length])];
BOOL isContainLink = resultString.count > 0;
if (isContainLink) {
for (NSTextCheckingResult* result in resultString) {
CGRect linkPosition = [self frameOfTextRange:result.range inTextView:self.txtMessage];
if(CGRectContainsPoint(linkPosition, tapLocation) == 1){
if (result.resultType == NSTextCheckingTypePhoneNumber) {
NSString *phoneNumber = [@"telprompt://" stringByAppendingString:result.phoneNumber];
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:phoneNumber]];
}
else if (result.resultType == NSTextCheckingTypeLink) {
[[UIApplication sharedApplication] openURL:result.URL];
}
}
}
}
}
- (CGRect)frameOfTextRange:(NSRange)range inTextView:(UITextView *)textView
{
UITextPosition *beginning = textView.beginningOfDocument;
UITextPosition *start = [textView positionFromPosition:beginning offset:range.location];
UITextPosition *end = [textView positionFromPosition:start offset:range.length];
UITextRange *textRange = [textView textRangeFromPosition:start toPosition:end];
CGRect firstRect = [textView firstRectForRange:textRange];
CGRect newRect = [textView convertRect:firstRect fromView:textView.textInputView];
return newRect;
}
import Foundation
extension NSAttributedString.Key {
static let myAttributeName = NSAttributedString.Key(rawValue: "MyCustomAttribute")
}
import UIKit
class ViewController: UIViewController, UIGestureRecognizerDelegate {
@IBOutlet weak var textView: UITextView!
override func viewDidLoad() {
super.viewDidLoad()
// Create an attributed string
let myString = NSMutableAttributedString(string: "Swift attributed text")
// Set an attribute on part of the string
let myRange = NSRange(location: 0, length: 5) // range of "Swift"
let myCustomAttribute = [ NSAttributedString.Key.myAttributeName: "some value"]
myString.addAttributes(myCustomAttribute, range: myRange)
textView.attributedText = myString
// Add tap gesture recognizer to Text View
let tap = UITapGestureRecognizer(target: self, action: #selector(myMethodToHandleTap(_:)))
tap.delegate = self
textView.addGestureRecognizer(tap)
}
@objc func myMethodToHandleTap(_ sender: UITapGestureRecognizer) {
let myTextView = sender.view as! UITextView
let layoutManager = myTextView.layoutManager
// location of tap in myTextView coordinates and taking the inset into account
var location = sender.location(in: myTextView)
location.x -= myTextView.textContainerInset.left;
location.y -= myTextView.textContainerInset.top;
// character index at tap location
let characterIndex = layoutManager.characterIndex(for: location, in: myTextView.textContainer, fractionOfDistanceBetweenInsertionPoints: nil)
// if index is valid then do something.
if characterIndex < myTextView.textStorage.length {
// print the character index
print("character index: \(characterIndex)")
// print the character at the index
let myRange = NSRange(location: characterIndex, length: 1)
let substring = (myTextView.attributedText.string as NSString).substring(with: myRange)
print("character at index: \(substring)")
// check if the tap location has a certain attribute
let attributeName = NSAttributedString.Key.myAttributeName
let attributeValue = myTextView.attributedText?.attribute(attributeName, at: characterIndex, effectiveRange: nil)
if let value = attributeValue {
print("You tapped on \(attributeName.rawValue) and the value is: \(value)")
}
}
}
}
character index: 1
character at index: w
You tapped on MyCustomAttribute and the value is: some value
class MyClass: UIViewController, UITextViewDelegate {
@IBOutlet weak var tvBottom: UITextView!
override func viewDidLoad() {
super.viewDidLoad()
let attributedString = NSMutableAttributedString(string: "click me ok?")
attributedString.addAttribute(NSLinkAttributeName, value: "cs://moreinfo", range: NSMakeRange(0, 5))
tvBottom.attributedText = attributedString
tvBottom.delegate = self
}
func textView(textView: UITextView, shouldInteractWithURL URL: NSURL, inRange characterRange: NSRange) -> Bool {
UtilityFunctions.alert("clicked", message: "clicked")
return false
}
}
let termsAndConditionsURL = TERMS_CONDITIONS_URL;
let privacyURL = PRIVACY_URL;
override func viewDidLoad() {
super.viewDidLoad()
self.txtView.delegate = self
let str = "By continuing, you accept the Terms of use and Privacy policy"
let attributedString = NSMutableAttributedString(string: str)
var foundRange = attributedString.mutableString.range(of: "Terms of use") //mention the parts of the attributed text you want to tap and get an custom action
attributedString.addAttribute(NSLinkAttributeName, value: termsAndConditionsURL, range: foundRange)
foundRange = attributedString.mutableString.range(of: "Privacy policy")
attributedString.addAttribute(NSLinkAttributeName, value: privacyURL, range: foundRange)
txtView.attributedText = attributedString
}
func textView(_ textView: UITextView, shouldInteractWith URL: URL, in characterRange: NSRange) -> Bool {
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let vc = storyboard.instantiateViewController(withIdentifier: "WebView") as! SKWebViewController
if (URL.absoluteString == termsAndConditionsURL) {
vc.strWebURL = TERMS_CONDITIONS_URL
self.navigationController?.pushViewController(vc, animated: true)
} else if (URL.absoluteString == privacyURL) {
vc.strWebURL = PRIVACY_URL
self.navigationController?.pushViewController(vc, animated: true)
}
return false
}
import UIKit
class InteractiveUnderlinedTextView: UITextView {
override init(frame: CGRect, textContainer: NSTextContainer?) {
super.init(frame: frame, textContainer: textContainer)
configure()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
configure()
}
func configure() {
isScrollEnabled = false
isEditable = false
isSelectable = false
isUserInteractionEnabled = true
}
override func point(inside point: CGPoint, with event: UIEvent?) -> Bool {
let superBool = super.point(inside: point, with: event)
let characterIndex = layoutManager.characterIndex(for: point, in: textContainer, fractionOfDistanceBetweenInsertionPoints: nil)
guard characterIndex < textStorage.length else { return false }
let attributes = textStorage.attributes(at: characterIndex, effectiveRange: nil)
return superBool && attributes[NSAttributedString.Key.underlineStyle] != nil
}
}
import UIKit
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
let linkTextView = InteractiveUnderlinedTextView()
linkTextView.backgroundColor = .orange
let mutableAttributedString = NSMutableAttributedString(string: "Some text\n\n")
let attributes = [NSAttributedString.Key.underlineStyle: NSUnderlineStyle.single.rawValue]
let underlinedAttributedString = NSAttributedString(string: "Some other text", attributes: attributes)
mutableAttributedString.append(underlinedAttributedString)
linkTextView.attributedText = mutableAttributedString
let tapGesture = UITapGestureRecognizer(target: self, action: #selector(underlinedTextTapped))
linkTextView.addGestureRecognizer(tapGesture)
view.addSubview(linkTextView)
linkTextView.translatesAutoresizingMaskIntoConstraints = false
linkTextView.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
linkTextView.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true
linkTextView.leadingAnchor.constraint(equalTo: view.readableContentGuide.leadingAnchor).isActive = true
}
@objc func underlinedTextTapped(_ sender: UITapGestureRecognizer) {
print("Hello")
}
}
import UIKit
extension UITapGestureRecognizer {
func didTapAttributedTextInTextView(textView: UITextView, inRange targetRange: NSRange) -> Bool {
let layoutManager = textView.layoutManager
let locationOfTouch = self.location(in: textView)
let index = layoutManager.characterIndex(for: locationOfTouch, in: textView.textContainer, fractionOfDistanceBetweenInsertionPoints: nil)
return NSLocationInRange(index, targetRange)
}
}
guard let text = textView.attributedText?.string else {
return
}
let textToTap = "Tap me"
if let range = text.range(of: textToTap),
tapGesture.didTapAttributedTextInTextView(textView: textTextView, inRange: NSRange(range, in: text)) {
// Tap recognized
}