DRTableViewManager-iOS

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DRTableViewManager-iOS

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Object-oriented UITableViewDataSource and UITableViewDelegate protocols proxy

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# DRTableViewManager (iOS)

> Object-oriented UITableViewDataSource and UITableViewDelegate protocols proxy

Simple wrapper around `UITableViewDataSource` and `UITableViewDelegate` protocols that allows easy `UITableView` content configuration using blocks or custom objects representing sections and rows.

General logic behind `DRTableViewManager`:

- `DRTableViewManager` - implements `UITableViewDataSource` and `UITableViewDelegate` protocols, owns `DRTableViewSectionController`
- `DRTableViewSectionController` - defines sections (`DRTableViewSection`) for given table view
- `DRTableViewSection` - represents table view section; defines rows (`DRTableViewRow`) for that section; implements sections-connected part of `UITableViewDataSource` and `UITableViewDelegate` protocols
- `DRTableViewRow` - represents table view row; defines cell (`UITableViewCell`) for that row; implements rows-connected part of `UITableViewDataSource` and `UITableViewDelegate` protocols

![DRTableViewManager graph](https://raw.githubusercontent.com/darrarski/DRTableViewManager-iOS/master/Misc/graph.png "DRTableViewManager graph")

Full `UITableViewDataSource` and `UITableViewDelegate` protocols are supported. For example, `DRTableViewSection` also defines section's header and footer (as well as their heights), and `DRTableViewRow` defines `UITableViewCell` height, didSelect action etc.

In addition, `DRTableViewManager` was designed to allow using `UITableViewAutomaticDimension` cell height on iOS 7. Behaviour for resolving automatic cell height can be configured by setting `automaticRowHeightResolvingType` property on `DRTableViewManager` object. `DRTableViewAutomaticRowHeightResolvingType` has three available options:

- `DRTableViewResolveAutomaticRowHeightAutomatically` - row height will be computed by iOS automatically using `UITableViewAutomaticDimension` (available only on iOS 8).
- `DRTableViewResolveAutomaticRowHeightManually` - row height will be computed by resolving AutoLayout on cell. It will be handled automatically by `DRTableViewManager` if `tableViewCellForComputingRowHeightAtIndexPathBlock` is set for row.
- `DRTableViewResolveAutomaticRowHeightAutomaticallyIfAvailable` (default value) - `UITableViewAutomaticDimension` will be used if availabe, otherwise height will be resolved like when using `DRTableViewResolveAutomaticRowHeightManually` option.

If you are using UIKit elements that requires setting `preferredMaxLayoutWidth` to layout properly, use `DRTableViewResolveAutomaticRowHeightManually` option to avoid issues on different iOS versions. See Example 2 for more details.

## Instalation

You can integrate `DRTableViewManager` with your project using CocoaPods. To do so, you will need to add one of the following lines to your Podfile:

For stable release (recommended):

pod 'DRTableViewManager', '~> 1.0.13'

Which creates dependecy for version `>= 1.0.13` and `< 1.1`

You can also download zip archive of given release from [releases page](https://github.com/darrarski/DRTableViewManager-iOS/releases).

## Usage

Check out included example project or `TableViewDemo` in its own [reposotory](https://github.com/darrarski/TableViewDemo).

### Example 1

Shows basic usage, where sections and cells are statically defined in arrays.

### Example 2

Shows basic usage as well, but configures automatic cell heights basing on their content. Works for both iOS 8 (using native `UITableViewAutomaticDimension`) and iOS 7 (computes height with AutoLayout - see source code for details).

### TL;DR

Example usage:

```objective-c
DRTableViewGenericSectionsController *sectionsController = [[DRTableViewGenericSectionsController alloc] init];
sectionsController.sectionsCountBlock = ^NSInteger {
    return 3;
};
sectionsController.sectionAtIndexBlock = ^NSObject <DRTableViewSection> *(NSInteger sectionIndex) {
    return [DRTableViewGenericSection createWithBlock:^(DRTableViewGenericSection *section) {
        section.tableViewTitleForHeaderInSectionBlock = ^NSString *(UITableView *tableView, NSInteger tableSectionIndex) {
            return [NSString stringWithFormat:@"Section %ld", (long)tableSectionIndex];
        };
        section.tableViewHeightForHeaderInSectionBlock = ^CGFloat(UITableView *tableView, NSInteger tableSectionIndex) {
            return 30;
        };
        section.tableViewNumberOfRowsInSectionBlock = ^NSInteger(UITableView *tableView, NSInteger tableSectionIndex) {
            return 3;
        };
        section.rowAtIndexBlock = ^NSObject <DRTableViewRow> *(NSInteger rowIndex) {
            return [DRTableViewGenericRow createWithBlock:^(DRTableViewGenericRow *row) {
                row.tableViewHeightForRowAtIndexPathBlock = ^CGFloat(UITableView *tableView, NSIndexPath *indexPath) {
                    return 44;
                };
                row.tableViewCellForRowAtIndexPathBlock = ^UITableViewCell *(UITableView *tableView, NSIndexPath *indexPath) {
                    UITableViewCell *cell = [[UITableViewCell alloc] init]; 
                    cell.textLabel.text = [NSString stringWithFormat:@"Row %ld", (long)indexPath.row];
                    return cell;
                };
            }];
        };
    }];
};
_tableViewManager = [[DRTableViewManager alloc] initWithSectionsController:sectionsController];
[_tableViewManager registerInTableView:self.tableView];
```

## Changelog

##### v1.0.13

> Fixed issue with manually computed row height on iOS 9

##### v1.0.12

> Added `scrollViewDelegate` (`<UIScrollViewDelegate>`) property to `DRTableViewManager`

##### v1.0.11

> Added helper methods to `DRTableViewManager`: 
> 
> - `rowForCell:atIndexPath:`
> - `sectionForFooterHeaderView:atIndex:`

##### v1.0.10

> Fixed import statements in header files

##### v1.0.9

> `DRTableViewManager` updated, added `sectionAtIndex:` and `rowAtIndexPath:` methods

##### v1.0.8

> `DRTableViewGenericRow` and `DRTableViewGenericSection` initialization adjusted to common patters, builder method renamed from `createWithBlock:` to `newWithBlock:`

##### v1.0.7

> Added cells cache to `DRTableViewManager`, useful for caching cells used for computing row height

> Examples updated

##### v1.0.6

> Added `automaticRowHeightResolvingType` property to `DRTableViewManager`

> Examples updated

##### v1.0.5

> Added `tableView:cellForComputingRowHeightAtIndexPath:` method to `DRTableViewRow` protocol for supporting `UITableViewAutomaticDimension` cell height under iOS 7

> Added `tableView:configureCell:forRowAtIndexPath:` method to `DRTableViewRow` protocol

> Examples updated

##### v1.0.4

> Deployment target changed to iOS 7.0, `DRTableViewManager` is compatible with both iOS 7 and iOS 8.

> Added Example 2 that shows how to implement automatic cell heights that works natively on iOS 8, but also on iOS 7 with some additional code.

##### v1.0.3

> Fixed - wrong method called on `DRTableViewRow` object for `tableView:heightForRowAtIndexPath:` method from `UITableViewDelegate` protocol

##### v1.0.2

> Fixed invalid protocol compliance definitions for arrays

##### v1.0.1

> Minor fixes

##### v1.0.0

> Inital release, supports iOS 8

## License

The MIT License (MIT) - check out included [LICENSE](LICENSE) file

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