iOS Swift Post Request Example

gistfile1.txt

 var request = NSMutableURLRequest(URL: NSURL(string: "https://api.nutritionix.com/v1_1/search/")!)
        let session = NSURLSession.sharedSession()
        request.HTTPMethod = "POST"
        var params = [
            "appId" : kAppId,
            "appKey" : kAppKey,
            "fields" : ["item_name", "brand_name", "keywords", "usda_fields"],
            "limit"  : "50",
            "query"  : searchString,
            "filters": ["exists":["usda_fields": true]]
        ]
        
        var error: NSError?
        request.HTTPBody = NSJSONSerialization.dataWithJSONObject(params, options: nil, error: &error)
        
        request.addValue("application/json", forHTTPHeaderField: "Content-Type")
        request.addValue("application/json", forHTTPHeaderField: "Accept")