Question

我想在网址查询中使用UIWebView的值在UITextField中加载网址：

let texts = SearchBox.text!
let searchurl = "http://sngpoisk.ru/search-location/?search_keywords=\(texts)&search_location=&place_location=&latitude=&longitude="
let urls = NSURL(string:searchurl)
let ret = NSURLRequest(URL:urls!)
Browser!.loadRequest(ret)

但是当texts包含俄语字符时，会发生错误：

EXC_BAD_INSTRUCTION（代码= EXC_1386_INVOP，子代码= 0x0）

Answer 1

运行时错误的原因是您打开了NSURL的可选实例，实际上是nil。

urls nil的原因是searchurl字符串包含invalid个字符（在7位ASCII范围之外）。要在URL中使用字符应进行百分比编码。

Swift 2 （我猜您使用的是该版本）：

let encodedTexts = texts.stringByAddingPercentEncodingWithAllowedCharacters(NSCharacterSet.URLQueryAllowedCharacterSet())
if let encodedTexts = encodedTexts {
    let searchurl = "http://sngpoisk.ru/search-location/?search_keywords=\(encodedTexts)&search_location=&place_location=&latitude=&longitude="
    let urls = NSURL(string:searchurl)
    if let urls = urls {
        let ret = NSURLRequest(URL:urls)
        Browser!.loadRequest(ret)
    }
}

斯威夫特3：

let encodedTexts = texts.addingPercentEncoding(withAllowedCharacters: NSCharacterSet.urlQueryAllowed)
if let encodedTexts = encodedTexts {
    let searchurl = "http://sngpoisk.ru/search-location/?search_keywords=\(encodedTexts)&search_location=&place_location=&latitude=&longitude="
    let urls = URL(string:searchurl)
    if let urls = urls {
        let ret = URLRequest(url:urls)
        Browser!.loadRequest(ret)
    }
}

Answer 2

我非常感谢你

let texts = Searchd.text!
    let encodedTexts = texts.stringByAddingPercentEncodingWithAllowedCharacters( NSCharacterSet.URLQueryAllowedCharacterSet())
    if let encodedTexts = encodedTexts {
        let searchurl = "http://sngpoisk.ru/search-location/?search_keywords=\(encodedTexts)&search_location=&place_location=&latitude=&longitude="
        let urls = NSURL(string:searchurl)
        if let urls = urls {
            let ret = NSURLRequest(URL:urls)
            Browser!.loadRequest(ret)
        }
    }

在URL查询中使用俄语字符

2 个答案: