How can i convert NSString to NSDate?

How can i convert NSString to NSDate?

from these Strings:

    NSString *year = @"2010";
NSString *month = @"3开发者_JS百科";
NSString *day = @"12";

to change UIDatePicker.Thanks

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NSDateFormatter can turn a string into a date. You create an NSDateFormatter object, set its format using setDateFormat: and then use its dateFromString: method to convert a string into a date.