NSArray用法簡記

用法1：
NSString *strings[3];
strings[0] = @"First";
strings[1] = @"Second";
strings[2] = @"Third";
NSArray *stringsArray = [NSArray arrayWithObjects:strings count:2];
// strings array contains { @"First", @"Second" }


用法2：
NSArray *myArray;
NSDate *aDate = [NSDate distantFuture];
NSValue *aValue = [NSNumber numberWithInt:5];
NSString *aString = @"a string";
myArray = [NSArray arrayWithObjects:aDate, aValue, aString, nil];