在Objective-C枚举中查找整数值

typedef NS_ENUM(NSInteger, Weekday) {
    Sunday,
    Monday,
    Tuesday,
    Wednesday,
    Thursday,
    Friday,
    Saturday
};

Weekday weekday = 2;
NSString *weekdayString = nil;

switch (weekday) {
    case Sunday:
        weekdayString = @"星期日";
        break;
    case Monday:
        weekdayString = @"星期一";
        break;
    case Tuesday:
        weekdayString = @"星期二";
        break;
    case Wednesday:
        weekdayString = @"星期三";
        break;
    case Thursday:
        weekdayString = @"星期四";
        break;
    case Friday:
        weekdayString = @"星期五";
        break;
    case Saturday:
        weekdayString = @"星期六";
        break;
    default:
        break;
}

NSLog(@"%@", weekdayString);