The time interval for calculating two dates in iOS development, and the time interval for calculating two dates in ios development

The time interval for calculating two dates in iOS development, and the time interval for calculating two dates in ios development

// Create a formatted object

NSDateFormatter * dateFormatter = [[NSDateFormatter alloc] init];

[DateFormatter setDateFormat: @ "yyyy-MM-dd HH: mm: ss"];

// Create a date object

NSDate * date1 = [dateFormatter dateFromString: @ "2020-10-31 00:00:00"];

NSDate * date = [NSDate date];

// Calculation interval (in seconds)

NSTimeInterval time = [date1 timeIntervalSinceDate: date];

// Calculates the number of days, hours, minutes, and seconds.

Int days = (int) time)/(3600*24 );

Int hours = (int) time) % (3600*24)/3600;

Int minutes = (int) time) % (3600*24) % 3600/60;

Int seconds = (int) time) % (3600*24) % 3600% 60;

NSString * dateContent = [[NSString alloc] initWithFormat: @ "Only % I days % I hours % I minutes % I seconds", days, hours, minutes, seconds];

(% I can automatically convert the input to decimal, while % d won't convert)

// Value assignment display

UILabel * timeLab = (UILabel *) [self. view viewWithTag: 666666];

TimeLab. text = dateContent;