iOS 11 tableview新增滑动手势

iOS 11中tableview增加了新的代理方法

- (nullable UISwipeActionsConfiguration *)tableView:(UITableView *)tableView trailingSwipeActionsConfigurationForRowAtIndexPath:(NSIndexPath *)indexPath API_AVAILABLE(ios(11.0)) API_UNAVAILABLE(tvos);

来进行滑动操作，可以长滑删除（挺好玩的），也可以轻微滑动，然后点击删除进行删除操作，与以前相同

具体代码如下

#import "ViewController.h"

@interface ViewController ()<UITableViewDelegate, UITableViewDataSource>

@property (nonatomic, strong) UITableView *tableView;
@property (nonatomic, strong) NSMutableArray *dataArray;


@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    self.view.backgroundColor = [UIColor greenColor];
    
    _dataArray = [NSMutableArray arrayWithArray:@[@"1", @"2", @"3", @"4", @"5"]];

    _tableView = [[UITableView alloc]initWithFrame:self.view.bounds style:UITableViewStyleGrouped];
    _tableView.backgroundColor = [UIColor whiteColor];
    _tableView.dataSource = self;
    _tableView.delegate = self;
    
    self.tableView.sectionHeaderHeight = 0.1;
    self.tableView.sectionFooterHeight = 0.1;
    _tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
    [self.view addSubview:_tableView];
}

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return 1;
}

-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    
    return self.dataArray.count;
}

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"id"];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"id"];
    }
    cell.textLabel.text = _dataArray[indexPath.section];
    return cell;
}

-(UISwipeActionsConfiguration *)tableView:(UITableView *)tableView trailingSwipeActionsConfigurationForRowAtIndexPath:(NSIndexPath *)indexPath {
    
    if (@available(iOS 11.0, *)) {
        UIContextualAction *deleteAction = [UIContextualAction contextualActionWithStyle:UIContextualActionStyleDestructive title:@"取消\n收藏" handler:^(UIContextualAction * _Nonnull action, __kindof UIView * _Nonnull sourceView, void (^ _Nonnull completionHandler)(BOOL)) {            
            [self.dataArray removeObjectAtIndex:indexPath.section];
            [self.tableView deleteSections:[NSIndexSet indexSetWithIndex:indexPath.section]
                          withRowAnimation:UITableViewRowAnimationFade];
            completionHandler(YES);
        }];
        //也可以设置图片
        deleteAction.backgroundColor = [UIColor redColor];
        UISwipeActionsConfiguration *config = [UISwipeActionsConfiguration configurationWithActions:@[deleteAction]];
        return config;
    } else {
        // Fallback on earlier versions
        return nil;
    }
}


- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}


@end

也可以在cell的头部添加滑动的操作代理方法如下：

- (nullable UISwipeActionsConfiguration *)tableView:(UITableView *)tableView leadingSwipeActionsConfigurationForRowAtIndexPath:(NSIndexPath *)indexPath API_AVAILABLE(ios(11.0)) API_UNAVAILABLE(tvos);