无法将'NSNull'（0x10aa1b600）类型的值转换为'NSString'（0x10b4dab48） [英] Could not cast value of type 'NSNull' (0x10aa1b600) to 'NSString' (0x10b4dab48)

问题描述

我的json有餐馆的googleplus链接，如果餐厅没有任何googleplus链接，它显示null但是我得到如上所述的错误。

My json has googleplus links of restaurants and it shows null if restaurant does not have any googleplus link But I get error of as mentioned above.

if dict["googlepluslink"] != nil
{
    self.googlepluslink.append((dict["googlepluslink"] as? String)!)
}
else
{
    self.googlepluslink.append(("-" as? String)!)
}

无法转换类型'NSNull'的值（0x10aa1b600）到'NSString'（0x10b4dab48）

Could not cast value of type 'NSNull' (0x10aa1b600) to 'NSString' (0x10b4dab48)

推荐答案

使用如果让或保护要检查的语句 dict [googlepluslink] 是否为String，然后根据你可以附加如下数据

use if let or guard statement to check dict["googlepluslink"] is String or not and then according to that you can append your data like below

if let link = dict["googlepluslink"] as? String 
{ 
    self.googlepluslink.append(link)
} 
else {
    self.googlepluslink.append("-")
}

这篇关于无法将'NSNull'（0x10aa1b600）类型的值转换为'NSString'（0x10b4dab48）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！