UITableView自定义左划删除遇到的问题

时间 2019-11-25

标签 uitableview 自定义删除遇到问题繁體版

原文原文链接

xcode9.1 ios8.1系统 UITableView的层级结构： Xcode9.1 ios11 系统 UITableView的层级结构：ios

ios8.0之后自定义左划删除功能有个新的方法：（在左边添加两个按钮）xcode

- (NSArray<UITableViewRowAction *> *)tableView:(UITableView *)tableView editActionsForRowAtIndexPath:(NSIndexPath *)indexPath{

    UITableViewRowAction *action0 = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleNormal title:nil handler:^(UITableViewRowAction *action, NSIndexPath *indexPath) {
        PLog(@"点击了发标");
        CKLWaitChectModel *model = self.allData[indexPath.row];
        [self putBorrow:model.ID];
        // 收回左滑出现的按钮(退出编辑模式)
        tableView.editing = NO;
    }];

    UITableViewRowAction *action1 = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleDefault title:nil handler:^(UITableViewRowAction *action, NSIndexPath *indexPath) {
        PLog(@"点击了删除");
        CKLWaitChectModel *model = self.allData[indexPath.row];
        [self deleteOne:model.ID];
        // 收回左滑出现的按钮(退出编辑模式)
        tableView.editing = NO;

    }];

    return @[action1, action0];

}

实现了上面这个方法之后就不会再执行下面这个方法，由于都是处理左边划出按钮点击事件的spa

（注：ios11 如下的系统，下面这个方法（↓）必须实现，可是里面能够不作任何操做，若是不实现就不会有滑动功能）code

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath{
    PLog(@"这个方法是为了兼容ios11如下的系统，这里面能够不实现任何功能");
}

设置编辑模式：（注：ios11 如下系统左划风格不支持UITableViewCellEditingStyleInsert | UITableViewCellEditingStyleDelete这种格式，若是真想用这种左边选中对勾的风格就得判断下cell是否是左划，而后根据状态给出对应的enum）orm

- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath；

/*
    UITableViewCellEditingStyleNone, 
    UITableViewCellEditingStyleDelete, 进入编辑状态后左边“减号” ，右边Delete
    UITableViewCellEditingStyleInsert  进入编辑状态后左边“加号”
*/
UITableViewCellEditingStyleInsert | UITableViewCellEditingStyleDelete 进入编辑状态后左边就是可选的“对勾”

只要实现上面两个方法后就具有左划功能了，只是右边的按钮效果不是咱们想要的而已，下面咱们就来自定义右边的按钮事件

文章的开头咱们已经了解了tableview的层级结构，ios11之后侧滑视图是直接添加在tableview上的，ios11之前是添加在cell上的，咱们要作出相应的适配（我这里是统一在tableview中捕获修改了，还能够分开来作）ip

我是自定义了tableview，因此写在了layoutsubviews方法里面，没自定义的话就写在viewDidLayoutSubviews里面：rem

- (void)viewDidLayoutSubviews{
    [super viewDidLayoutSubviews];
    NSLog(@"%s", __func__);
        
        //    NSLog(@"tableview的子视图：：：=++==+= = ==%@", self.subviews);
        // 获取选项按钮的reference
        if (@available(iOS 11, *)){
            // iOS 11层级 (Xcode 9编译): UITableView -> UISwipeActionPullView
            for (UIView *subview in self.table.subviews)
            {
                if ([subview isKindOfClass:NSClassFromString(@"UISwipeActionPullView")] && [subview.subviews count] >= 2)
                {
                    subview.backgroundColor = [UIColor whiteColor];
                    CGFloat btnHeight = subview.frame.size.height;
                    CGFloat btnW = 60;
                    UIButton *deleteButton = subview.subviews[1];
                    UIButton *readButton = subview.subviews[0];
                    
                    CGRect subFrame = subview.frame;
                    subFrame = CGRectMake(DEVICE_AVALIABLE_WIDTH - 170, subFrame.origin.y, 170, subFrame.size.width);
                    subview.frame = subFrame;
                    
                    deleteButton.frame = CGRectMake(70, (btnHeight - btnW) * 0.5, btnW, btnW);
                    deleteButton.layer.cornerRadius = 3;
                    deleteButton.layer.masksToBounds = YES;
                    [deleteButton.titleLabel removeFromSuperview];
                    
                    UILabel *deleteLB = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, btnW, btnW)];
                    deleteLB.textAlignment = NSTextAlignmentCenter;
                    deleteLB.text = @"移除";
                    deleteLB.font = [UIFont fontWithName:@"PingFangSC-Light" size:14];
                    deleteLB.textColor = [UIColor whiteColor];
                    [deleteButton addSubview:deleteLB];
                    deleteButton.backgroundColor = [UIColor redColor];
                    
                    readButton.frame = CGRectMake(0, (btnHeight - btnW) * 0.5, btnW, btnW);
                    readButton.titleLabel.textAlignment = NSTextAlignmentCenter;
                    readButton.layer.cornerRadius = 3;
                    readButton.layer.masksToBounds = YES;
                    [readButton.titleLabel removeFromSuperview];
                    UILabel *readButtonLB = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, btnW, btnW)];
                    readButtonLB.textAlignment = NSTextAlignmentCenter;
                    readButtonLB.text = @"发标";
                    readButtonLB.font = [UIFont fontWithName:@"PingFangSC-Light" size:14];
                    readButtonLB.textColor = [UIColor whiteColor];
                    [readButton addSubview:readButtonLB];
                    readButton.backgroundColor = [UIColor blueColor];
                }
            }
            
        }
        else{
            // iOS 8-10层级: UITableView -> UITableViewCell -> UITableViewCellDeleteConfirmationView
            UITableViewCell *cell = [self.table cellForRowAtIndexPath:self.editingIndexPath];
            for (UIView *subview in cell.subviews){
                if ([subview isKindOfClass:NSClassFromString(@"UITableViewCellDeleteConfirmationView")] && [subview.subviews count] >= 2){
                    
                    subview.backgroundColor = [UIColor blueColor];
                    CGFloat btnHeight = subview.frame.size.height;
                    CGFloat btnW = 60;
                    UIButton *deleteButton = subview.subviews[1];
                    UIButton *readButton = subview.subviews[0];
                    
                    deleteButton.frame = CGRectMake(70, (btnHeight - btnW) * 0.5, btnW, btnW);
                    deleteButton.layer.cornerRadius = 3;
                    deleteButton.layer.masksToBounds = YES;
                    [deleteButton.titleLabel removeFromSuperview];
                    UILabel *deleteLB = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, btnW, btnW)];
                    deleteLB.textAlignment = NSTextAlignmentCenter;
                    deleteLB.text = @"移除";
                    deleteLB.font = [UIFont fontWithName:@"PingFangSC-Light" size:14];
                    deleteLB.textColor = [UIColor whiteColor];
                    [deleteButton addSubview:deleteLB];
                    deleteButton.backgroundColor = [UIColor redColor];
                    
                    readButton.frame = CGRectMake(0, (btnHeight - btnW) * 0.5, btnW, btnW);
                    readButton.titleLabel.textAlignment = NSTextAlignmentCenter;
                    readButton.layer.cornerRadius = 3;
                    readButton.layer.masksToBounds = YES;
                    [deleteButton.titleLabel removeFromSuperview];
                    UILabel *readButtonLB = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, btnW, btnW)];
                    readButtonLB.textAlignment = NSTextAlignmentCenter;
                    readButtonLB.text = @"发标";
                    readButtonLB.font = [UIFont fontWithName:@"PingFangSC-Light" size:14];
                    readButtonLB.textColor = [UIColor whiteColor];
                    [readButton addSubview:readButtonLB];
                    readButton.backgroundColor = [UIColor yellowColor];
                    
                    
                }
            }
            
        }

}

注：IOS13cell的层级结构又有变化it

if (@available(iOS 13.0, *)) {
                if ([subView isKindOfClass:NSClassFromString(@"_UITableViewCellSwipeContainerView")]) {
                    for (UIView *sb in subView.subviews) {
                        if ([sb isKindOfClass:NSClassFromString(@"UISwipeActionPullView")]) {