1.NSString * -> NSDate *
- (nullableNSDate*)dateFromString:(NSString*)string;
例:
NSString *dataString = @"2017年11月12日";
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
dateFormatter.dateFormat = @"yyyy年MM月dd日";
NSDate *destDate= [dateFormatter dateFromString:dataString];
NSLog(@"destDate - %@",destDate);
2.NSDate * -> NSString *
- (NSString*)stringFromDate:(NSDate*)date;
例:
NSDate*date = [NSDatedate];
NSDateFormatter*fmt = [[NSDateFormatteralloc] init];
fmt.dateFormat =@"yyyy年MM月dd号 HH:mm:ss";
NSString*string = [fmt stringFromDate:date];
3.获取系统当前时间:
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
formatter.dateFormat = @"YYYY年MM月dd日";
NSDate *nowDate = [NSDate date];
NSString *currentTimeString = [formatter stringFromDate:nowDate];
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