![} else ...
return cell;
}
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeue...];
id model = [self modelAtIndex:indexPath.row];
if ([model isKindOfClass:[News class]]) {
NewsCell *newsCell = (NewsCell *)cell;
[newsCell setupWithNews:model];
} else if ([model isKindOfClass:[Advertisement class]]) {
AdvertisementCell *adCell = (AdvertisementCell *)cell;
[adCell setupWithAd:model];](https://image.slidesharecdn.com/beingsolid-161117123243/85/Being-SOLID-28-320.jpg)
![} else ...
return cell;
}
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeue...];
id model = [self modelAtIndex:indexPath.row];
if ([model isKindOfClass:[News class]]) {
NewsCell *newsCell = (NewsCell *)cell;
[newsCell setupWithNews:model];
} else if ([model isKindOfClass:[Advertisement class]]) {
AdvertisementCell *adCell = (AdvertisementCell *)cell;
[adCell setupWithAd:model];](https://image.slidesharecdn.com/beingsolid-161117123243/85/Being-SOLID-29-320.jpg)
![} else ...
return cell;
}
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeue...];
id model = [self modelAtIndex:indexPath.row];
if ([model isKindOfClass:[News class]]) {
NewsCell *newsCell = (NewsCell *)cell;
[newsCell setupWithNews:model];
} else if ([model isKindOfClass:[Advertisement class]]) {
AdvertisementCell *adCell = (AdvertisementCell *)cell;
[adCell setupWithAd:model];](https://image.slidesharecdn.com/beingsolid-161117123243/85/Being-SOLID-30-320.jpg)
![} else ...
return cell;
}
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeue...];
id model = [self modelAtIndex:indexPath.row];
if ([model isKindOfClass:[News class]]) {
NewsCell *newsCell = (NewsCell *)cell;
[newsCell setupWithNews:model];
} else if ([model isKindOfClass:[Advertisement class]]) {
AdvertisementCell *adCell = (AdvertisementCell *)cell;
[adCell setupWithAd:model];](https://image.slidesharecdn.com/beingsolid-161117123243/85/Being-SOLID-31-320.jpg)
![} else ...
return cell;
}
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeue...];
id model = [self modelAtIndex:indexPath.row];
if ([model isKindOfClass:[News class]]) {
NewsCell *newsCell = (NewsCell *)cell;
[newsCell setupWithNews:model];
} else if ([model isKindOfClass:[Advertisement class]]) {
AdvertisementCell *adCell = (AdvertisementCell *)cell;
[adCell setupWithAd:model];](https://image.slidesharecdn.com/beingsolid-161117123243/85/Being-SOLID-32-320.jpg)
![- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath {
id model = [self modelAtIndex:indexPath.row];
UITableViewCell<ConfigurableCell> *cell = ...;
[cell configureWithObject:model];
return cell;
}](https://image.slidesharecdn.com/beingsolid-161117123243/85/Being-SOLID-34-320.jpg)
![- (void)hideViews {
[UIView animateWithDuration:1.0
animations:^
{
for (UIView *view in self.animatableViews) {
view.alpha = 0.5f;
}
}];
}](https://image.slidesharecdn.com/beingsolid-161117123243/85/Being-SOLID-42-320.jpg)
![- (void)displayNews {
NSPredicate *newsPredicate = ...;
NSArray *news = [News MR_findAllWithPredicate:newsPredicate];
// Отображаем новости
}
Зависимость от Core Data](https://image.slidesharecdn.com/beingsolid-161117123243/85/Being-SOLID-54-320.jpg)
![@protocol NewsProvider <NSObject>
- (NSArray *)obtainNewsForDate:(NSDate *)date;
@end
Зависимость от Core Data
- (void)displayNews {
NSDate *todayDate = ...;
NSArray *news = [self.newsProvider obtainNewsForDate:todayDate];
// Отображаем новости
}](https://image.slidesharecdn.com/beingsolid-161117123243/85/Being-SOLID-56-320.jpg)
![@protocol NewsProvider <NSObject>
- (NSArray *)obtainNewsForDate:(NSDate *)date;
@end
Зависимость от Core Data
- (void)displayNews {
NSDate *todayDate = ...;
NSArray *news = [self.newsProvider obtainNewsForDate:todayDate];
// Отображаем новости
}](https://image.slidesharecdn.com/beingsolid-161117123243/85/Being-SOLID-57-320.jpg)
Being SOLID
- 1. Кто подставил Барбару Лисков? или Кто кого SOLID? Сергей Крапивенский, Rambler&Co
- 2. как сказал наш великий полководец Суворов “Do Not Learn Frameworks”
- 7. RayWenderlich - driven development Senior ReactiveCocoa Developer Рамблер - секта VIPER
- 11. Фундаментальные знания • Структуры данных • Алгоритмы • Паттерны • DRY, KISS, YAGNI • SOLID • И многое другое
- 13. Single responsibility principle Open-closed principle Liskov substitution principle Interface segregation principle Dependency inversion principle
- 14. Single Responsibility Principle “A class should have only one reason to change”
- 15. MassiveViewController 1.Ответственности сильно связаны 2.Класс перестает помещаться в голове 3.Тяжело поддерживать и тестировать
- 16. UITableViewController 1.Изменение логики работы с таблицей 2.Поменять иерархию вьюшек
- 17. UITableViewController Решение проблемы: не использовать его
- 18. Запуск приложения Push Notifications Quick Actions Уведомления о состояниях приложения Открытие по URL Фоновая загрузка данных AppDelegate
- 19. AppDelegate Запуск приложения Quick Actions ПоискPush Notifications Открытие URL Состояния приложения Загрузка в фоне Handoff Extensions
- 20. AppDelegate Запуск приложения Quick Actions ПоискPush Notifications Открытие URL Состояния приложения Загрузка в фоне Handoff Extensions https://github.com/rambler-digital-solutions/RamblerAppDelegateProxy
- 21. SRP о снижении сложности
- 22. Single responsibility principle Open-closed principle Liskov substitution principle Interface segregation principle Dependency inversion principle
- 23. Open-Closed Principle “Software entities (classes, modules, functions, etc.) should be open for extension, but closed for modification”
- 27. Новость Новость Новость Новость Новость с фото Новость с фото Реклама Реклама
- 28. } else ... return cell; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { UITableViewCell *cell = [tableView dequeue...]; id model = [self modelAtIndex:indexPath.row]; if ([model isKindOfClass:[News class]]) { NewsCell *newsCell = (NewsCell *)cell; [newsCell setupWithNews:model]; } else if ([model isKindOfClass:[Advertisement class]]) { AdvertisementCell *adCell = (AdvertisementCell *)cell; [adCell setupWithAd:model];
- 29. } else ... return cell; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { UITableViewCell *cell = [tableView dequeue...]; id model = [self modelAtIndex:indexPath.row]; if ([model isKindOfClass:[News class]]) { NewsCell *newsCell = (NewsCell *)cell; [newsCell setupWithNews:model]; } else if ([model isKindOfClass:[Advertisement class]]) { AdvertisementCell *adCell = (AdvertisementCell *)cell; [adCell setupWithAd:model];
- 30. } else ... return cell; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { UITableViewCell *cell = [tableView dequeue...]; id model = [self modelAtIndex:indexPath.row]; if ([model isKindOfClass:[News class]]) { NewsCell *newsCell = (NewsCell *)cell; [newsCell setupWithNews:model]; } else if ([model isKindOfClass:[Advertisement class]]) { AdvertisementCell *adCell = (AdvertisementCell *)cell; [adCell setupWithAd:model];
- 31. } else ... return cell; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { UITableViewCell *cell = [tableView dequeue...]; id model = [self modelAtIndex:indexPath.row]; if ([model isKindOfClass:[News class]]) { NewsCell *newsCell = (NewsCell *)cell; [newsCell setupWithNews:model]; } else if ([model isKindOfClass:[Advertisement class]]) { AdvertisementCell *adCell = (AdvertisementCell *)cell; [adCell setupWithAd:model];
- 32. } else ... return cell; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { UITableViewCell *cell = [tableView dequeue...]; id model = [self modelAtIndex:indexPath.row]; if ([model isKindOfClass:[News class]]) { NewsCell *newsCell = (NewsCell *)cell; [newsCell setupWithNews:model]; } else if ([model isKindOfClass:[Advertisement class]]) { AdvertisementCell *adCell = (AdvertisementCell *)cell; [adCell setupWithAd:model];
- 34. - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { id model = [self modelAtIndex:indexPath.row]; UITableViewCell<ConfigurableCell> *cell = ...; [cell configureWithObject:model]; return cell; }
- 35. NewsCell PhotoCell AdCell <ConfigurableCell> - (void)configure:(<CellObject>)object; News Photo Advert <CellObject> - (Class)cellClass;
- 36. Когда применять?
- 38. Single responsibility principle Open-closed principle Liskov substitution principle Interface segregation principle Dependency inversion principle
- 40. Liskov Substitution Principle “Subtypes must be substitutable for their base types”
- 41. Нужен для проверки корректности наследования
- 42. - (void)hideViews { [UIView animateWithDuration:1.0 animations:^ { for (UIView *view in self.animatableViews) { view.alpha = 0.5f; } }]; }
- 43. UIView UIVisualEffectView Всё ок ! <UIVisualEffectView> is being asked to animate its opacity. This will cause the effect to appear broken until opacity returns to 1
- 44. ¯_( )_/¯
- 45. Single responsibility principle Open-closed principle Liskov substitution principle Interface segregation principle Dependency inversion principle
- 46. Interface Segregation Principle “Clients should not be forced to depend on methods that they do not use”
- 47. MailAPIClient - auth - findContact - getMailboxes - createMailbox - sendMail Auth Contacts Mailboxes Messages - auth - findContact - getMailboxes - createMailbox - sendMail - auth - findContact - getMailboxes - createMailbox - sendMail - auth - findContact - getMailboxes - createMailbox - sendMail - auth - findContact - getMailboxes - createMailbox - sendMail
- 48. AuthServiceMailboxServiceContactServiceMessageService Auth Contacts Mailboxes Messages - auth - findContact - getMailboxes - createMailbox - sendMail - auth - findContact - getMailboxes - createMailbox - sendMail - auth - findContact - getMailboxes - createMailbox - sendMail - auth - findContact - getMailboxes - createMailbox - sendMail MailAPIClient
- 49. ISP - это не SRP
- 50. - sendSelfDestructMessage - deleteBothMessages ChatChannel - loadMessages - sendMessage - replyToMessage - forwardMessage ChannelSecretChat Supergroup - banUser Group - loadMessages - sendMessage - replyToMessage - forwardMessage - sendSelfDestruct - deleteBoth - pinMessage - banUser - pinMessage - loadMessages - sendMessage - replyToMessage - forwardMessage - sendSelfDestruct - deleteBoth - pinMessage - banUser - loadMessages - sendMessage - replyToMessage - forwardMessage - sendSelfDestruct - deleteBoth - pinMessage - banUser - loadMessages - sendMessage - replyToMessage - forwardMessage - sendSelfDestruct - deleteBoth - pinMessage - banUser
- 51. Single responsibility principle Open-closed principle Liskov substitution principle Interface segregation principle Dependency inversion principle
- 52. Dependency Inversion Principle “A. High-level modules should not depend on low-level modules. Both should depend on abstractions”
- 53. Dependency Inversion Principle “B. Abstractions should not depend on details. Details should depend on abstractions”
- 54. - (void)displayNews { NSPredicate *newsPredicate = ...; NSArray *news = [News MR_findAllWithPredicate:newsPredicate]; // Отображаем новости } Зависимость от Core Data
- 56. @protocol NewsProvider <NSObject> - (NSArray *)obtainNewsForDate:(NSDate *)date; @end Зависимость от Core Data - (void)displayNews { NSDate *todayDate = ...; NSArray *news = [self.newsProvider obtainNewsForDate:todayDate]; // Отображаем новости }
- 57. @protocol NewsProvider <NSObject> - (NSArray *)obtainNewsForDate:(NSDate *)date; @end Зависимость от Core Data - (void)displayNews { NSDate *todayDate = ...; NSArray *news = [self.newsProvider obtainNewsForDate:todayDate]; // Отображаем новости }
- 58. @interface NewsViewController : UIViewController - (instancetype)initWithNewsProvider:(id<NewsProvider>)newsProvider; @end Зависимость от Core Data
- 61. Серебряной пули нет 😢
- 62. - Оноре де Бальзак “Обстоятельства переменчивы, принципы - никогда”