无法将“URL”类型的值转换为预期的参数类型“Bool”[关闭]

Question

在下面的代码中，错误是这样来的。错误就像

“无法将'URL'类型的值转换为预期的参数类型'Bool']”

private func saveImages(){

        let document = try !FileManager.default.url(for:.documentDirectory , in : .userDomainMask , appropriateFor:  nil , create: true) //[error is = Cannot convert value of type 'URL' to expected argument type 'Bool']
        print (document)

        let imgUrl = document.appendingPathComponent("1.jpg" , isDirectory : true)
        print(imgUrl.path)

        if FileManager.default.fileExists(atPath: imgUrl.path){
            do{
                try UIImageJPEGRepresentation(UIImage(named : "1.jpg") !)?.write (to :imgUrl)
                print("image added successfully")
            }catch{
                print("image not added")
            }

        }


    }

Answer 1

有一个微妙但关键的错字。

替换

try !FileManager

有

try! FileManager