OC Foundation--A preliminary introduction to common classes and the nsdate of simple use

First, create a time

NSDate *date = [NSDate Date];

The time to print is 0 time zone (Beijing-East eight district)

NSLog (@ "%@", date);

Second, date format class NSDateFormatter

1> Date Conversion string

1 //Create a NSDate object2NSDate *date =[NSDate Date];3     //Create a NSDateFormatter object4NSDateFormatter *formatter =[[NSDateFormatter alloc] init];5     //format the NSDateFormatter object6     //y year M month D Day7     //m min S second h (24) H (12)8Formatter.dateformat =@"YYYY-MM-DD HH:mm:ss";9     //Converts a given time object into a string in a well-established formatTenNSString *str = [Formatter stringfromdate:date];

2> converts a given time string into a date format

The method name used [Formatter datefromstring:time];

OC Foundation--A preliminary introduction to common classes and the nsdate of simple use