KVC中一些好用的东西

by 伍雪颖

NSArray *array = @[@"foo",@"bar",@"baz"];NSArray *capitals = [array valueForKey:@"capitalizedString"];NSArray *capitalLengths = [array valueForKeyPath:@"capitalizedString.length"];NSUInteger totalLength = [[array valueForKeyPath:@"@sum.length"] intValue];