我有一个Web服务,它以这种格式返回日期:
2013-04-14
我该如何确定这对应哪一天?
这段代码将获取你的字符串,将其转换为NSDate对象,并提取出该日期的数字(14)和星期几的名称(Sunday)。
NSString *myDateString = @"2013-04-14";
// Convert the string to NSDate
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
dateFormatter.dateFormat = @"yyyy-MM-dd";
NSDate *date = [dateFormatter dateFromString:myDateString];
// Extract the day number (14)
NSDateComponents *components = [[NSCalendar currentCalendar] components:NSDayCalendarUnit fromDate:date];
NSInteger day = [components day];
// Extract the day name (Sunday)
dateFormatter.dateFormat = @"EEEE";
NSString *dayName = [dateFormatter stringFromDate:date];
// Print
NSLog(@"Day: %d: Name: %@", day, dayName);
注意:此代码适用于ARC。如果使用MRC,请在末尾添加[dateFormatter release]。
获取工作日的另一种方法是:
NSString *myDateString = @"2013-04-14";
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"yyyy-MM-dd"];
NSDate *date = [dateFormatter dateFromString:myDateString];
NSDateComponents *components = [[NSCalendar currentCalendar] components:NSWeekdayCalendarUnit fromDate:date];
NSInteger weekday = [components weekday];
NSString *weekdayName = [dateFormatter weekdaySymbols][weekday - 1];
NSLog(@"%@ is a %@", myDateString, weekdayName);
NSString *dateString = @"2013-04-14";
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"yyyy-MM-dd"];
NSDate *dateFromString = [[NSDate alloc] init];
dateFromString = [dateFormatter dateFromString:dateString];
[dateFormatter setDateFormat:@"EEEE"];
NSLog(@"%@", [dateFormatter stringFromDate:dateFromString]);
let datFromat = DateFormatter()
datFormat.dateFormat = "EEEE"
let name = datFormat.string(from: Date())
奖励: 如果你想设置自己的日期模板而不是使用上面的Date()
:
let datFormat = DateFormatter()
datFormat.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZZZZZ"
let thisDate = datFormat.date(from: "2016-10-13T18:00:00-0400")
在此之后调用第一个代码。
NSArray *dateComponents = [date componentsSeperatedByString:@"-"];
NSString *day = [dateComponents lastObject];
NSDate
的文档? - Raptor