I believe jsonObject(with:options) will throw if the JSON is invalid, so you might be able to get away with just the try/catch. Besides, your JSON top level object might be an array, in which case I’d expect that casting to an NSDictionary would fail.
Saagar Jha > On Jan 29, 2018, at 12:17, Eric E. Dolecki <[email protected]> wrote: > > I am generating a String of JSON. Before I use it, I want to check to make > sure that it's valid. My code is below. Does this look alright? > > Thanks, > Eric > > > > let jsonString = composedString > > let jsonData = jsonString.data(using: String.Encoding.utf8) > > do { > > if (try JSONSerialization.jsonObject(with: jsonData!, options: > []) as? NSDictionary) != nil { > > print("JSON is a dictionary. Valid.") > > } else { > > print("Not valid JSON data.") > > } > > } catch let error as NSError { > > print("Not valid JSON. \(error.localizedDescription)") > > } > _______________________________________________ > > Cocoa-dev mailing list ([email protected]) > > Please do not post admin requests or moderator comments to the list. > Contact the moderators at cocoa-dev-admins(at)lists.apple.com > > Help/Unsubscribe/Update your Subscription: > https://lists.apple.com/mailman/options/cocoa-dev/saagar%40saagarjha.com > > This email sent to [email protected] _______________________________________________ Cocoa-dev mailing list ([email protected]) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [email protected]
