我和Json玩了最后两天,面对很多好奇的问题,而且由于堆栈溢出,它对我很有帮助.这是json特色键具有两种类型的值String Type.
"featured":"1"
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要么
"featured": null,
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我尝试了很多来处理这个但失败了
if dict.objectForKey("featured") as? String != nil {
featured = dict.objectForKey("featured") as? String
}
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第2步)
let null = NSNull()
if dict.objectForKey("featured") as? String != null {
featured = dict.objectForKey("featured") as? String
}
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第3步)
if dict.objectForKey("featured") as? String != "" {
featured = dict.objectForKey("featured") as? String
}
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但不幸的是找不到解决办法,你的回答将不胜感激.
我安装了新的 OSX High Siera,问题:所有已安装的证书均已删除。所以我使用本地计算机签名证书创建了新的分发证书,并将其下载并安装到计算机中。当我运行项目或它给出错误。我尝试了 stackOverflow 中找到的所有步骤,但无法解决。
我从coreData获取实体数据,返回AnyObject,我尝试了很多转换为NSDictionary和NSArray,但它不能投出任何类型.
var dictData:NSDictionary?
let appDelegate = UIApplication.sharedApplication().delegate as! AppDelegate
let context = appDelegate.managedObjectContext;
// self.selectedArray = response.objectForKey("retailers") as! NSArray;
let fetchRequest2 = NSFetchRequest()
let entityDescription2 = NSEntityDescription.entityForName("Offers", inManagedObjectContext: context)
fetchRequest2.entity = entityDescription2
//fetchRequest2.returnsObjectsAsFaults = false
do {
let result2 : NSDictionary = try context.executeFetchRequest(fetchRequest2) as! NSDictionary
print("Result:",result2)
for result in (result2 as? NSDictionary)!{
if let data : NSDictionary = result as? NSDictionary{
print(data)
}
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Offer Entity包含No Of fields.请帮助.它会受到赞赏.
print("result: ",result)
print("dictData:",dictData)
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`}