Detect if time format is in 12hr or 24hr format

I figured it out, its pretty easy. I just added this code to viewDidLoad :

NSDateFormatter *formatter = [[NSDateFormatter alloc] init];[formatter setLocale:[NSLocale currentLocale]];[formatter setDateStyle:NSDateFormatterNoStyle];[formatter setTimeStyle:NSDateFormatterShortStyle];NSString *dateString = [formatter stringFromDate:[NSDate date]];NSRange amRange = [dateString rangeOfString:[formatter AMSymbol]];NSRange pmRange = [dateString rangeOfString:[formatter PMSymbol]];BOOL is24h = (amRange.location == NSNotFound && pmRange.location == NSNotFound);[formatter release];NSLog(@"%@\n",(is24h ? @"YES" : @"NO"));

And it perfectly returns YES or NO depending on the locale.

And here is a Swift 3.0 updated version

func using12hClockFormat() -> Bool {    let formatter = DateFormatter()    formatter.locale = Locale.current    formatter.dateStyle = .none    formatter.timeStyle = .short    let dateString = formatter.string(from: Date())    let amRange = dateString.range(of: formatter.amSymbol)    let pmRange = dateString.range(of: formatter.pmSymbol)    return !(pmRange == nil && amRange == nil)}

this is swift solution that worked for me, those two above did not.

let dateString: String = DateFormatter.dateFormat(    fromTemplate: "j", options: 0,    locale: Locale.current)!if(dateString.contains("a")){// 12 h format   return true}else{// 24 h format   return false}