Javascript 将 CSS 注入(inject) Swift WebView

Question

我试图在 xCode 上加载一个页面，然后用另一个文件覆盖它的样式。我已经在 Chrome 中手动测试了这一点，页面的 2 个部分应该变成鲜红色，但它们不在我的 XCode 元素中。有什么想法吗？

class ViewController: UIViewController {

var urlPath = "http://grappul.com"

@IBOutlet weak var webView: UIWebView!

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
    loadAddress()
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

func loadAddress(){
    let requestURL = NSURL(string:urlPath)
    let request = NSURLRequest(URL: requestURL!)
    webView.loadRequest(request)
    println("got the page!")
    webViewDidFinishLoad(webView)
}

func webViewDidFinishLoad(website: UIWebView){
    var jsscript = "var script = document.createElement('link');
    script.type = 'text/css'; 
    script.rel = 'stylesheet'; 
    script.href = 'http://www.grappul.com/snapkin/restyle.css';
    document.getElementByTagName('head')[0].appendChild(script);"
    println("got the css!")
    website.stringByEvaluatingJavaScriptFromString(jsscript)
}

非常感谢大家!

Answer 1

UIWebView 似乎没有大型 JavaScript 接口(interface)来查找错误报告，但您应该看看 Safari Web 检查器及其监控任何 UIWebView 应用程序的能力:

https://developer.apple.com/library/prerelease/ios/documentation/AppleApplications/Conceptual/Safari_Developer_Guide/Introduction/Introduction.html

然而，要让它与任何 iOS 应用程序一起工作，似乎还需要做一些额外的工作(请参阅入门:基于 Webkit 的应用程序)