[Code Note] compared with the current time, note the current time

[Code Note] compared with the current time, note the current time

Code:

# Import "RootViewController. h "@ interface RootViewController () @ end @ implementation RootViewController-(id) initWithNibName :( NSString *) bundle :( NSBundle *) handle {self = [super initWithNibName: nibNameOrNil bundle: nibBundleOrNil]; if (self) {// Custom initialization} return self;}-(void) viewDidLoad {[super viewDidLoad]; // Do any additional setup after loading the view. // obtain the NSLog format of the specified date (@ "--- % @ ----", [self changeTheDate: @ "2013-04-18" ByDateType: @ "yyyy-M-dd"]); // The day of the week NSLog (@ "--- % @ ---", [self getTheWeekDay: @ "2013-04-18"]); // the week of the year, the day of the week, compare whether two days are the same week NSDate * today = [NSDate date]; NSLog (@ "-- % ld ---", (long) [self didWeekOfYear: today]); NSLog (@ "--- % ld ---", (long) [self didWeekDay: today]); NSLog (@ "--- % ld ---", (long) [self didSameWeek: today date: today]) ;}# pragma-mark-get the format of the specified date/* Get the string representation of the specified date format paramDate: date: "" paramDateType: format of the date to be converted: "yyyy-M-dd" */-(NSString *) changeTheDate :( NSString *) paramDate ByDateType :( NSString *) paramDateType {// convert a date to the desired format yyyy-MM-dd TO yyyy-M-dd NSDateFormatter * dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setDateFormat: @ "yyyy-MM-dd"]; NSDate * tempDate = [dateFormatter dateFromString: paramDate]; [dateFormatter setDateFormat: paramDateType]; NSString * theDate = [dateFormatter stringFromDate: tempDate]; NSString * result = [[NSString alloc] initWithString: theDate]; return result;} # pragma-mark-day of the week/* day of the week */-(NSString *) getTheWeekDay :( NSString *) paramDate {NSDateFormatter * dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setDateFormat: @ "yyyy-M-dd"]; NSDate * theDate = [dateFormatter dateFromString: paramDate]; NSString * result = nil; NSInteger theWeek = [self didWeekDay: theDate]; switch (theWeek) {case 1: result = @ "Sunday"; break; case 2: result = @ "Monday"; break; case 3: result = @ "Tuesday"; break; case 4: result = @ "Wednesday"; break; case 5: result = @ "Thursday"; break; case 6: result = @ "Friday"; break; case 7: result = @ "Saturday"; break; default: break;} return result ;}# pragma-mark-the day of the week // obtain the day of the week-(NSInteger) didWeekDay :( NSDate *) date {NSCalendar * gregorian = [[NSCalendar alloc] parts: Unknown]; NSDateComponents * weekdayComponents = [gregorian components :( NSDayCalendarUnit | interval) fromDate: date]; NSInteger tempweekday = [weekdayComponents weekday]; return tempweekday;} # pragma-mark-the week number Of The Year // obtain the week number of the year as the current time-(NSInteger) didWeekOfYear :( NSDate *) date {NSInteger unitFlags = Beijing; NSCalendar * gregorian = [NSCalendar currentCalendar]; NSDateComponents * weekdayComponents = [gregorian components: unitFlags fromDate: date]; NSInteger weekOfYear = [weekdayComponents weekOfYear]; return weekOfYear;} # pragma-mark-determine whether it is a week // determine whether it is the same week-(BOOL) didSameWeek :( NSDate *) date1 date :( NSDate *) date2 {NSInteger week1 = [self didWeekOfYear: date1]; NSInteger week2 = [self didWeekOfYear: date2]; return week1 = week2;} @ end