ios - EXC_BAD_INSTRUCTION(代码=EXC_1386，INVOP，子代码=0x0)错误

Question

当我尝试从 Parse.com 帐户中提取 NewsPages 类的内容子类时，应用程序崩溃并且日志显示:EXC_BAD_INSTRUCTION (code =EXC_1386,INVOP,subcode=0x0) 错误.

请帮我解决这个问题。

代码如下:

import UIKit

class ViewController: UIViewController {

@IBOutlet weak var teamNewsTextView: UITextView!

    override func viewDidLoad() {



        var query = PFQuery(className:"NewsPages")
        query.getObjectInBackgroundWithId("KerL5Xf0Bx") {
            (NewsPages: PFObject!, error: NSError!) -> Void in
            if error == nil {
                let content = NewsPages["content"] as String

                self.teamNewsTextView.text = content

            } else {
                NSLog("%@", error)
            }
        }



}}

Answer 1

试试这个

 if error == nil {

if let content = NewsPages["content"] as? String
{
  self.teamNewsTextView.text = content

}
} 
else {
    NSLog("%@", error)
}