How to setTimeStyle AM/PM to lowercase using the iPhone SDK

How can I set the AM / PM time style to lowercase? I'm using the following code and according to Apple's documentation this should returned t开发者_如何学JAVAhese values as lowercase but it doesn't.

[_detailsTimeFormatter setTimeStyle:NSDateFormatterShortStyle];

You can change the AM and PM symbols on an NSDateFormatter as follows:

[dateFormatter setAMSymbol:@"am"];
[dateFormatter setPMSymbol:@"pm"];

or in Swift:

formatter.amSymbol = "am"
formatter.pmSymbol = "pm"

I am not sure why Apple's examples show the AM / PM in lower case, but it is easy to make the date string lower case:

NSDateFormatter *detailsTimeFormatter = [[NSDateFormatter alloc] init];
[detailsTimeFormatter setTimeStyle:NSDateFormatterShortStyle];
NSLog(@"%@",[[detailsTimeFormatter stringFromDate:[NSDate date]] lowercaseString]);

Swift 5:

You can add handy extension to date formatter:

extension DateFormatter { 
    static let myFormattedDate: DateFormatter = {
         let formatter = DateFormatter()
         formatter.dateFormat = "E MM/dd/yyyy HH:mm a" //enter any format you like.
         formatter.amSymbol = "am" //By default AM/PM symbols are uppercased
         formatter.pmSymbol = "pm"
         return formatter
    }()
}

Then you would use it like this:

DateFormatter.myFormattedDate.string(from: Date()) // Here enter your date and it will return string value formatted to the format you provided with lowercased am/pm symbols.

Checkout NSDateFormatter.com to discover the perfect format.