如何在UIWebView而不是Safari中打开UITextView Web链接？

Question

我正在开发和iPhone 3.0应用程序.我正在尝试将UITextView中的Web链接打开到UIWebView而不是Safari.但仍然没有运气.

这UITextView是不可编辑的,它可以完美地检测Web链接并在Safari中打开它们.

怎么避免呢？如何获取该网址,以便我可以使用我自己的UIWebView？

Answer 1

这是一个古老的问题,但任何人都在寻找更新的方式.

在viewController的.m文件中将您的viewController分配为一个委托UITextView,只需添加:

-(BOOL)textView:(UITextView *)textView shouldInteractWithURL:(NSURL *)URL inRange:(NSRange)characterRange{

    //Do something with the URL
    NSLog(@"%@", URL);


    return NO;
}

Answer 2

最简单的方法是像这样覆盖webView:decidePolicyForNavigationAction:request:frame:decisionListener:方法UITextView:

@interface UITextView (Override)
@end

@class WebView, WebFrame;
@protocol WebPolicyDecisionListener;

@implementation UITextView (Override)

- (void)webView:(WebView *)webView decidePolicyForNavigationAction:(NSDictionary *)actionInformation request:(NSURLRequest *)request frame:(WebFrame *)frame decisionListener:(id < WebPolicyDecisionListener >)listener
{
    NSLog(@"request: %@", request);
}
@end

这将影响UITextView您的应用程序中的所有s.如果您只在单个视图上需要这个,请创建一个子类并覆盖该方法.

_{注意:这在技术上是一个私有API,可以随时删除.没有办法通过公共API执行此操作.}

编辑:从iOS 7.0开始,引入了一种新方法UITextViewDelegate来支持这一点.有关详细信息,请参阅nihad的答案.

Answer 3

使用Swift 3,UITextViewDelegate提供了一种textView(_:shouldInteractWith:in:interaction:)方法.textView(_:shouldInteractWith:in:interaction:)有以下声明:

询问委托是否指定的文本视图应允许在给定的文本范围内与给定URL进行指定类型的用户交互.

optional func textView(_ textView: UITextView,  shouldInteractWith URL: URL,  in characterRange: NSRange,  interaction: UITextItemInteraction) -> Bool

以下代码显示如何在Safari应用中打开UITextViewWeb链接SFSafariViewController而不是打开它们:

import UIKit
import SafariServices

class ViewController: UIViewController, UITextViewDelegate {

    override func viewDidLoad() {
        super.viewDidLoad()

        // Set textView
        let textView = UITextView()
        textView.text = "http://www.yahoo.fr http://www.google.fr"
        textView.isUserInteractionEnabled = true
        textView.isEditable = false
        textView.isSelectable = true
        textView.dataDetectorTypes = UIDataDetectorTypes.link

        // Add view controller as the textView's delegate
        textView.delegate = self

        // auto layout
        view.addSubview(textView)
        textView.translatesAutoresizingMaskIntoConstraints = false
        textView.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
        textView.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true
        textView.heightAnchor.constraint(equalToConstant: 300).isActive = true
        textView.widthAnchor.constraint(equalToConstant: 300).isActive = true
    }

    func textView(_ textView: UITextView, shouldInteractWith URL: URL, in characterRange: NSRange, interaction: UITextItemInteraction) -> Bool {
        // Open links with a SFSafariViewController instance and return false to prevent the system to open Safari app
        let safariViewController = SFSafariViewController(url: URL)
        present(safariViewController, animated: true, completion: nil)

        return false
    }

}