xcode – 类型’AnyObject’不符合协议’SequenceType’

发布时间：2020-12-15 01:56:42 所属栏目：百科来源：网络整理

导读：func loadThumbnails() { let paths = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory,NSSearchPathDomainMask.UserDomainMask,true) let documentsDirectory:NSString = paths[0] as NSString var error:NSError? let fileM

func loadThumbnails() {

    let paths = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory,NSSearchPathDomainMask.UserDomainMask,true)
    let documentsDirectory:NSString = paths[0] as NSString
    var error:NSError?
    let fileManager = NSFileManager()
    let directoryContent:AnyObject = fileManager.contentsOfDirectoryAtPath(documentsDirectory,error: &error)!

    thumbnails = [QSPhotoInfo]()

    for item:AnyObject in directoryContent {
        let fileName = item as NSString
        if fileName.hasPrefix(kThumbnailImagePrefix) {
            let image = loadImageFromDocumentsDirectory(fileName)
            var photoInfo = QSPhotoInfo()
            photoInfo.thumbnail = image;
            photoInfo.thumbnailFileName = fileName
            thumbnails += photoInfo
        }
    }
}

编译错误如下：

Type ‘AnyObject’ does not conform to protocol ‘SequenceType’

这个意思是什么？

谁可以帮助我，很多!!!!

解决方法

苹果在 The Swift Programming Language年：

The for-in loop performs a set of statements for each item in a range,
sequence,collection,or progression.

现在，directoryContent只是符合协议AnyObject，所以你不能使用它的循环。如果你想这样做，你必须做类似以下的事情：

for item in directoryContent as [AnyObject] {
    //Do stuff
}

（编辑：李大同）

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