NSDateFormatter *timeFormatter = [NSDateFormatter new];
[timeFormatter setDateStyle:NSDateFormatterFullStyle];
NSLocale *locale = [[NSLocale alloc] initWithLocaleIdentifier:@"zh"];
[timeFormatter setLocale:locale];
timeFormatter.dateFormat = @"yyyy/MM/dd EEE";
NSDate * date = [NSDate date];
NSString * str= [timeFormatter stringFromDate:date ];
