I need to show information without brackets - arrays

Question

I have code that get weather api but information from "weather" prints "id" and "main" information in console and also in text label with brackets in console
(
250
)
Here is some relevant code:
if let weather = jsonObj.value(forKey: "weather") as? NSArray {
let idObject = weather.value(forKey: "id")
// DispatchQueue.main.sync {
// self.weatherLabel.text = idObject as? String }
print (idObject)
let mainObject = weather.value(forKey: "main")
print(mainObject as Any)
}

Answer 1

Below, in the second half of this answer, I’ll describe what the issue is in your code snippet. But you are using Swift, so you shouldn’t be using NSDictionary and NSArray at all. You should use JSONDecoder to parse your json, and deal solely with Swift objects.
So you might define structures like so:
struct WeatherReport: Decodable {
let id: Int
let main: String
}
struct ResponseObject : Decodable {
let weather: [WeatherReport]
}
And decode it like so:
do {
let responseObject = try JSONDecoder().decode(ResponseObject.self, from: data)
for weatherReport in responseObject.weather {
print(weatherReport.id)
}
} catch {
print(error)
}
Now, my definition of WeatherReport is undoubtedly incorrect, as it needs to match your JSON structure, which you haven’t shared with us. For example, I’m assuming your id values are numeric (no quotes around them; we can’t tell by looking at your output). Also, you should check the documentation and figure out what the JSON looks like if there was an error. So you’d have to check that. But hopefully this illustrates the idea.
Regarding why you’re seeing the ( and ) around your values, that’s because the objects you are printing are, themselves, NSArray objects. When you call value(forKey:) on a NSArray of NSDictionary objects, it will go through the array and grab the value associated with that key for each dictionary in your array, and will return an array of values. Hence the ( and ) in the output. Sure, your “array of dictionaries” appears to currently have only one dictionary in it, but the fact that it is an array suggests that it’s possible that weather can possibly contain multiple dictionaries.
Consider this over-simplified version of your JSON:
{
"weather": [
{
"id": 42,
"main": "Rain"
},
{
"id": 520
"main": "Cloudy"
}
]
}
Thus
if let weather = jsonObj.value(forKey: "weather") as? NSArray {
let identifiers = weather.value(forKey: "id")
print (identifiers)
}
Will output
(
42,
520
)
Now, your array of dictionaries obviously only has one dictionary at this point, but this illustrates what’s going on.
If you don’t want the brackets, get the firstObject from the array:
guard
let weather = jsonObj.value(forKey: "weather") as? NSArray,
let weatherReport = weather.firstObject as? NSDictionary
else {
return
}
if let idObject = weatherReport.value(forKey: "id") as? Int {
print(idObject)
}
Or, if you want to print all of them:
guard
let weather = jsonObj.value(forKey: "weather") as? NSArray
else {
return
}
for object in array {
if let weatherReport = weather as? NSDictionary, let identifier = weatherReport["id"] as? Int {
print(identifier)
}
}
This is how one navigates a NSArray of NSDictionary objects. But, as described at the beginning of my answer, you shouldn’t be using these NS types at all. Get your raw Data, and decode it to model object types using JSONDecoder, instead.