将代码更新为 swift 2

Question

如何将以下代码更新为 swift 2 我是新手

if let rtf = NSBundle.mainBundle().URLForResource("rtfdoc", withExtension: "rtf", subdirectory: nil, localization: nil) {

        let attributedString = NSAttributedString(fileURL: rtf, options: [NSDocumentTypeDocumentAttribute:NSRTFTextDocumentType], documentAttributes: nil, error: nil)
        textView.attributedText = attributedString
        textView.editable = false

Answer 1

您必须在 try catch 中使用此代码，如下所示..

if let rtf = NSBundle.mainBundle().URLForResource("rtfdoc", withExtension: "rtf") {
    do {
        let attributedString = try NSAttributedString(fileURL: rtf, options: [NSDocumentTypeDocumentAttribute:NSRTFTextDocumentType], documentAttributes: nil)
        textView.attributedText = attributedString
        textView.editable = false
        print(attributedString)
    } catch let error as NSError {
        print(error.localizedDescription)
    }
}