《无限互联IOS开发阅读器类APP可用开源框架介绍2.docVIP

? ??继续介绍一个有用的TableView中全选单元格的例子，里面的方法可以用在阅读器中用户对阅读内容来源的选择上，如图所示： ? ? ? 核心代码如下： [objc]?view plaincopy -?(void)viewDidLoad?? {?? ????[super?viewDidLoad];?? ?????? ????//创建表视图?_table?? ????_table?=?[[UITableView?alloc]initWithFrame:CGRectMake(0,?64,?320,?500)?style:UITableViewStylePlain];?? ????_table.delegate?=?self;?? ????_table.dataSource?=?self;?? ????[self.view?addSubview:_table];?? ?????? ????//将字典?NO-?@checked?装入可变数组中，来控制单元格左边对勾视图?? ????_contacts?=?[NSMutableArray?array];?? ????for?(int?i?=?0;?i?10;?i++)?{?? ????????NSMutableDictionary?*dic?=?[NSMutableDictionary?dictionary];?? ????????[dic?setValue:@NO?forKey:@checked];?? ????????[_contacts?addObject:dic];?? ????}?? ?????? ????//创建?屏幕左上方的全选按钮?? ????_button?=?[UIButton?buttonWithType:UIButtonTypeRoundedRect];?? ????[_button?setTitle:@全选?forState:UIControlStateNormal];?? ????_button.frame?=?CGRectMake(10,?10,?100,?50);?? ????[_button?addTarget:self?action:@selector(allSelect:)?forControlEvents:UIControlEventTouchUpInside];?? ????[self.view?addSubview:_button];?? }?? [objc]?view plaincopy //?全选按钮的触发事件?? -?(void)allSelect:(UIButton*)sender{?? ?????? ????//将表视图的所有的单元格放在数组里?? ????NSArray?*anArrayOfIndexPath?=?[NSArray?arrayWithArray:[_table?indexPathsForVisibleRows]];?? ?????? ????for?(int?i?=?0;?i??[anArrayOfIndexPath?count];?i++)?{?? ?????????? ????????//?得到表视图的indexPath?? ????????NSIndexPath?*indexPath=?[anArrayOfIndexPath?objectAtIndex:i];?? ????????//创建每个单元格，?? ????????LTableViewCell?*cell?=?(LTableViewCell*)[_table?cellForRowAtIndexPath:indexPath];?? ????????NSUInteger?row?=?[indexPath?row];?? ????????NSMutableDictionary?*dic?=?[_contacts?objectAtIndex:row];?? ?????????? ????????//?判断当前按钮的状态是全选还是取消，设置不同的标记?? ????????if?([[[(UIButton*)sender?titleLabel]?text]?isEqualToString:@全选])?{?? ????????????[dic?setObject:@YES?forKey:@checked];?? ????????????[cell?setChecked:YES];?? ????????}else?{?? ????????????[dic?setObject:@NO?forKey:@checked];?? ????????????[cell?setChecked:NO];?? ????????}?? ????}?? ?????? ????//?两种状