Designing Object-Oriented Software by Rebecca Wirfs-Brock PDF

By Rebecca Wirfs-Brock

ISBN-10: 0136298257

ISBN-13: 9780136298250

useful and down-to-earth in technique, this bestseller explores the paintings of designing object-oriented software program. It deals simple layout ideas and a selected layout procedure that may be utilized to any software program programming attempt -- even these no longer utilizing object-oriented programming languages or environments. Covers the innovations of object-oriented know-how, provides a technique to use these suggestions, the instruments to exploit through the strategy, and examples to place all of it jointly. For builders of object-oriented software program.

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Info 55 56 CHAPTER 3: Managing On-Screen Content with View Controllers the fact that the loadNibName:owner:options: method returns an NSArray of the top-level objects in the nib: - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"CellIdentifier"]; if (cell == nil) { NSArray *nibObjects = [[NSBundle mainBundle] loadNibNamed:@"MyCellNib" owner:nil options:nil]; } } cell = [nibObjects objectAtIndex:0]; return cell; This method relies on the cell being the only object in the nib, but it doesn’t use any sleight of hand with outlets like the former method.

The naming convention is to capitalize the first letter and to use camelCase throughout. Next, we use @required to indicate that any methods following must be implemented by objects that conform to the WorkerDelegate protocol. You can also use @optional to signify methods that are declared but do not need to be implemented. Methods are now declared as optional by default, which wasn’t always an option. Because of that prior limitation, some older classes use ‘‘informal protocols,’’ which aren’t protocols in the language sense of the word.

One solution is a search bar at the top of the table view that narrows the list of content to that which matches the user’s search term. Another is to separate the content into letters, such as sorting a list of people by last name and then to allow the user to tap a letter on the right margin of the table view to jump to that letter’s section. To accomplish this, provide an array of letters in the data source’s sectionIndexTitlesForTableView: method, and specify which titles correspond to which sections in the tableView:sectionForSectionIndexTitle: method.

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Designing Object-Oriented Software by Rebecca Wirfs-Brock

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