How to get specific value from JSON in swift - json

Question

I can successfully parse all data from my json file. In my application in the collection view i try to parse only 1 image data to cell but i got related all data with it. I'll share the JSON code and the parse code with you and lastly screen shot of simulator. I hope you can help me about it.
Thank you,
JSON code
{
"retcode": "200",
"content": [{
"id": 3,
"name": "X Treme",
"desc": "Polikarbon G\u00f6vde",
"category": "Design",
"thumbnail": [{
"id": 2,
"thumbnail": "http:\/\/www.ertonga.com\/product_images\/xtreme_red.jpg"
}, {
"id": 3,
"thumbnail": "http:\/\/www.ertonga.com\/product_images\/xtreme_orange.jpg"
}, {
"id": 4,
"thumbnail": "http:\/\/www.ertonga.com\/product_images\/xtreme_blue.jpg"
}, {
"id": 5,
"thumbnail": "http:\/\/www.ertonga.com\/product_images\/xtreme_green.jpg"
}, {
"id": 6,
"thumbnail": "http:\/\/www.ertonga.com\/product_images\/xtreme_clear.jpg"
}, {
"id": 7,
"thumbnail": "http:\/\/www.ertonga.com\/product_images\/xtreme_grey.jpg"
}, {
"id": 8,
"thumbnail": "http:\/\/www.ertonga.com\/product_images\/xtreme_slred.jpg"
}]
}, {
"id": 4,
"name": "Opal",
"desc": "Polikarbon Sandalye",
"category": "Design",
"thumbnail": [{
"id": 9,
"thumbnail": "http:\/\/www.ertonga.com\/product_images\/opal_orange.jpg"
}, {
"id": 10,
"thumbnail": "http:\/\/www.ertonga.com\/product_images\/opal_blue.jpg"
}, {
"id": 11,
"thumbnail": "http:\/\/www.ertonga.com\/product_images\/opal_green.jpg"
}]
}],
"error_msg": ""
}
Swift Code
if let url = NSURL(string: urlString) {
if let data = try? NSData(contentsOfURL: url, options: [])
{
do {
let json = try NSJSONSerialization.JSONObjectWithData(data, options: .AllowFragments)
var valueforname:Int = 0
if let blogs = json["content"] as? [[String: AnyObject]] {
for blog in blogs {
if let blog2 = blog["thumbnail"] as? [[String: AnyObject]] {
for blog3 in blog2 {
if let blog4 = blog3["thumbnail"] as? String {
var checkvalue1 = blog3["id"] as? Int
if Imagearray.contains(String(checkvalue1!)) {
}
else {
Imagearray.append(blog4)
}
}
}
}
}
}
}
catch {
print("error serializing JSON: \(error)")
}
}
}
and here is the screen shots. You can see the different colors of chairs I want to only 1 color for each item

Answer 1

Try this one:
NSURL(string: urlString) {
if let data = try? NSData(contentsOfURL: url, options: [])
{
do {
let json = try NSJSONSerialization.JSONObjectWithData(data, options: .AllowFragments)
var valueforname:Int = 0
if let blogs = json["content"] as? [[String: AnyObject]] {
for blog in blogs {
if let blog2 = blog["thumbnail"] as? [[String: AnyObject]] {
if let blog4 = blog2["thumbnail"] as? String
{
Imagearray.append(blog4)
}
}
}
}
}
catch {
print("error serializing JSON: \(error)")
}
}
}