example
let formatter = DateComponentsFormatter()
formatter.unitsStyle = .positional
formatter.allowedUnits = [.minute,.hour,.second]
let outputString = formatter.string(from: 3601.0)
=> "1:00:01"
More than 5 years have passed since last update.
let formatter = DateComponentsFormatter()
formatter.unitsStyle = .positional
formatter.allowedUnits = [.minute,.hour,.second]
let outputString = formatter.string(from: 3601.0)
=> "1:00:01"
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