本文授權轉載,作者:@夏天是個大人了
前言: 本篇博客其實就是想介紹tableviewcell滑動的一些"事",昨天在逛github的時候看到的還挺有意思的三方庫,簡單用了一下感覺不錯,一作為記錄,二是希望有類似需求的可以得到幫助。
本篇介紹了iOS 5之後(使用三方庫) iOS 8之後(系統方法)分別的實現方式
效果圖 - ios>= 5.0
效果圖 - ios>= 8.0
MGSwipeTableCell(Github上的三方庫)- iOS >= 5.0
直接使用比較簡單 通過代碼看一下
首先簽這個協議MGSwipeTableCellDelegate
添加左邊按鈕方法
- (NSArray *)btnLeftCount:(int)count { NSMutableArray *result = [NSMutableArray array]; UIColor *colors[3] = {[UIColor greenColor], [UIColor colorWithRed:0 green:0x99/255.0 blue:0xcc/255.0 alpha:1.0], [UIColor colorWithRed:0.59 green:0.29 blue:0.08 alpha:1.0]};; for (int i = 0; i < count; i ++) { // 按鈕提供了幾個方法, 可以點進去看一看 MGSwipeButton *btn = [MGSwipeButton buttonWithTitle:@"" backgroundColor:colors[i] padding:15 callback:^BOOL(MGSwipeTableCell *sender) { return YES; }]; // 把按鈕加到數組中 [result addObject:btn]; } return result; }
添加右邊按鈕的方法
- (NSArray *)btnRightCount:(int)count { NSMutableArray *result = [NSMutableArray array]; NSArray *titleArray = @[@"刪除", @"標記未讀"]; UIColor *color[2] = {[UIColor redColor], [UIColor lightGrayColor]}; for (int i = 0; i < count; i ++) { MGSwipeButton *btn = [MGSwipeButton buttonWithTitle:titleArray[i] backgroundColor:color[i] padding:15 callback:^BOOL(MGSwipeTableCell *sender) { BOOL autoHide = i != 0; return autoHide; }]; // 把按鈕加到數組中 [result addObject:btn]; } return result; }
重用池可以這樣寫
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *cellID = @"cellId"; // 這裡如果MGSwipeTableCell是足夠你使用的, 你可以直接使用 // 或者自定義創建cell繼承於MGSwipeTableCell, 像我下面代碼這樣 XTCustomCell *cell = [tableView dequeueReusableCellWithIdentifier:cellID]; if (!cell) { cell = [[XTCustomCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:cellID]; } cell.label.text = [NSString stringWithFormat:@"%ld------%@", (long)indexPath.row, self.arrayTest[indexPath.row]]; cell.label.font = [UIFont systemFontOfSize:20]; // 指定代理人 cell.delegate = self; // NO: 只有單個可以滑動 , YES: 多個可以滑動 cell.allowsMultipleSwipe = NO; return cell; }
添加按鈕
-(NSArray*) swipeTableCell:(MGSwipeTableCell*) cell swipeButtonsForDirection:(MGSwipeDirection)direction swipeSettings:(MGSwipeSettings*) swipeSettings expansionSettings:(MGSwipeExpansionSettings*) expansionSettings; { if (direction == MGSwipeDirectionRightToLeft) { return [self btnRightCount:2]; } else { return [self btnLeftCount:3]; } }
按鈕的點擊代理方法
-(BOOL) swipeTableCell:(MGSwipeTableCell*) cell tappedButtonAtIndex:(NSInteger) index direction:(MGSwipeDirection)direction fromExpansion:(BOOL) fromExpansion { switch (direction) { case MGSwipeDirectionLeftToRight: { if (index == 0) { NSLog(@"right ------- 0"); }else{ NSLog(@"right ------- 1"); } break; } case MGSwipeDirectionRightToLeft: { if (index == 0) { NSLog(@"left ------- 0"); // 這裡簡單的做了個刪除操作 NSIndexPath * path = [_tableView indexPathForCell:cell]; [_arrayTest removeObjectAtIndex:path.row]; [_tableView deleteRowsAtIndexPaths:@[path] withRowAnimation:UITableViewRowAnimationLeft]; return NO; }else{ NSLog(@"left ------- 1"); } break; } } return YES; }
iOS 8之後也提供了類似的實現
- (NSArray*)tableView:(UITableView *)tableView editActionsForRowAtIndexPath:(NSIndexPath *)indexPath { UITableViewRowAction *deleteRowAction = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleDestructive title:@"刪除" handler:^(UITableViewRowAction * _Nonnull action, NSIndexPath * _Nonnull indexPath) { [self.arrayTest removeObjectAtIndex:indexPath.row]; [self.tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic]; }]; UITableViewRowAction *topRowAction = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleDefault title:@"置頂" handler:^(UITableViewRowAction * _Nonnull action, NSIndexPath * _Nonnull indexPath) { [self.arrayTest exchangeObjectAtIndex:indexPath.row withObjectAtIndex:0]; NSIndexPath *firstIndexPath = [NSIndexPath indexPathForRow:0 inSection:indexPath.section]; [tableView moveRowAtIndexPath:indexPath toIndexPath:firstIndexPath]; }]; topRowAction.backgroundColor = [UIColor blueColor]; UITableViewRowAction *moreRowAction = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleNormal title:@"更多" handler:^(UITableViewRowAction * _Nonnull action, NSIndexPath * _Nonnull indexPath) { [self.tableView reloadRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationMiddle]; }]; return @[deleteRowAction,topRowAction,moreRowAction]; }