PNG图像未保存到文档目录

Question

我正在尝试从照片库中加载图像并保存到手机的文档目录中，但是当我查看文档目录时，尚未创建PNG。我使用以下代码：

@IBAction func saveLogo(sender: AnyObject) {
    if (pickedImage != nil) {
        var fileName:String = "logo.png"   
        var arrayPaths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as NSString
        var pngFileName = arrayPaths.stringByAppendingPathComponent(fileName)    
        UIImagePNGRepresentation(pickedImage).writeToFile(arrayPaths, atomically:true)
    }
}

Answer 1

您可能希望写信至pngFileName而不是arrayPaths