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UITextView Subclass to avoid Long-Press Delays with embedded Links
//
// LinkedTextView.h
//
// Created by Benjamin Bojko on 10/22/14.
//
// The MIT License (MIT)
//
// Copyright (c) 2014 Benjamin Bojko
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
//
#import <UIKit/UIKit.h>
/**
* This is a subclass of @p UITextView that solves the problem of embedded link requiring a long-press
* before triggering. It uses a tap gesture recognizer to detect the attributes at the tap location and
* checks for embedded links. If a link is detected, it calls @p -[UITextViewDelegate textView:shouldInteractWithTextAttachment:inRange:]
* before calling @p -[UIApplication openURL:].
*/
@interface LinkedTextView : UITextView
@property (nonatomic, strong, readonly) UITapGestureRecognizer *linkTapGestureRecognizer;
@end
//
// LinkedTextView.m
//
// Created by Benjamin Bojko on 10/22/14.
//
// The MIT License (MIT)
//
// Copyright (c) 2014 Benjamin Bojko
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
//
#import "LinkedTextView.h"
@implementation LinkedTextView
- (instancetype)initWithFrame:(CGRect)frame textContainer:(NSTextContainer *)textContainer {
self = [super initWithFrame:frame textContainer:textContainer];
if (self) {
[self setupLinkedTextView];
}
return self;
}
- (id)initWithCoder:(NSCoder *)aDecoder {
self = [super initWithCoder:aDecoder];
if (self) {
[self setupLinkedTextView];
}
return self;
}
- (void)awakeFromNib {
[super awakeFromNib];
[self setupLinkedTextView];
}
- (void)setupLinkedTextView {
_linkTapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleLinkTapGestureRecognizer:)];
_linkTapGestureRecognizer.cancelsTouchesInView = NO;
_linkTapGestureRecognizer.delaysTouchesBegan = NO;
_linkTapGestureRecognizer.delaysTouchesEnded = NO;
[self addGestureRecognizer:_linkTapGestureRecognizer];
}
/**
* Since UITextViews only open links on long-press, we want to check
* if a user pressed a link in the text view right away. We can do this
* by getting the text attributes at the tap location and checking for
* a link in the attributed string.
*/
- (void)handleLinkTapGestureRecognizer:(UITapGestureRecognizer *)tapRecognizer {
UITextView *textView = self;
CGPoint tapLocation = [tapRecognizer locationInView:textView];
// we need to get two positions since attributed links only apply to ranges with a length > 0
UITextPosition *textPosition1 = [textView closestPositionToPoint:tapLocation];
UITextPosition *textPosition2 = [textView positionFromPosition:textPosition1 offset:1];
// check if we're beyond the max length and go back by one
if (!textPosition2) {
textPosition1 = [textView positionFromPosition:textPosition1 offset:-1];
textPosition2 = [textView positionFromPosition:textPosition1 offset:1];
}
// abort if we still don't have a string that's long enough
if (!textPosition2) {
return;
}
// get the offset range of the character we tapped on
UITextRange *range = [textView textRangeFromPosition:textPosition1 toPosition:textPosition2];
NSInteger startOffset = [textView offsetFromPosition:textView.beginningOfDocument toPosition:range.start];
NSInteger endOffset = [textView offsetFromPosition:textView.beginningOfDocument toPosition:range.end];
NSRange offsetRange = NSMakeRange(startOffset, endOffset - startOffset);
if (offsetRange.location == NSNotFound || offsetRange.length == 0) {
return;
}
if (NSMaxRange(offsetRange) > textView.attributedText.length) {
return;
}
// now grab the link from the string
NSAttributedString *attributedSubstring = [textView.attributedText attributedSubstringFromRange:offsetRange];
NSString *link = [attributedSubstring attribute:NSLinkAttributeName atIndex:0 effectiveRange:nil];
if (!link) {
return;
}
NSURL *URL = [NSURL URLWithString:link];
if (self.delegate && [self.delegate respondsToSelector:@selector(textView:shouldInteractWithURL:inRange:)]) {
// abort if the delegate doesn't allow us to open this URL
if (![self.delegate textView:self shouldInteractWithURL:URL inRange:offsetRange]) {
return;
}
}
[[UIApplication sharedApplication] openURL:URL];
}
@end
@vatsal1992
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vatsal1992 commented Jun 9, 2018

i've another solution for "Disabled Selection in UITextView and still you want Link selection"
i will show you what i tried,
checkout this StackOverflow answer

@OscarApeland
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I posted a Swift 4 solution over here for anyone else looking at this in 2018:) https://stackoverflow.com/a/53171516/1278026

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