我喜欢一步步的解析控件使用过程，其实真正的用心做一件事情是很享受的，虽然现在的社会都很注重效率和回报，这也是中国这种社会环境下难出大师级的人物的很重要的一个因素。扯得有点远了，只是希望国内开发者不要太急功近利，熟练应用本不是难事，一点点积累就好。下面开始搜索条
UISearchBar 和 UISearchDisplayController 的使用介绍。
第一步：添加UISearchBarDelegate,UISearchDisplayDelegate 委托
第二步：就是UISearchBar 和UISearchDisplayController的使用
//搜索框
self.searchBar = [[[UISearchBar alloc] initWithFrame:CGRectMake(10, 15, self.view.bounds.size.width-20, 45)]autorelease];
searchBar.placeholder=@"输入城市名或拼音";
searchBar.delegate = self;
searchBar.backgroundColor=[UIColor clearColor];
searchBar.backgroundImage=[UIImage imageNamed:@"搜索背景"];
searchBar.keyboardType=UIKeyboardTypeDefault;
myTableView.tableHeaderView = searchBar;
searchBar.autocorrectionType = UITextAutocorrectionTypeNo;
searchBar.autocapitalizationType = UITextAutocapitalizationTypeNone;
self.searchdispalyCtrl = [[[UISearchDisplayController alloc] initWithSearchBar:searchBar contentsController:self]autorelease];
//设置取消按钮文字颜色
searchdispalyCtrl.searchBar.tintColor=BB_Yanzheng_Color;
//search dispalyCtrl.active = NO;
//[searchdispalyCtrl.searchResultsTableView setHidden:NO];
searchdispalyCtrl.delegate = self;
searchdispalyCtrl.searchResultsDelegate=self;
searchdispalyCtrl.searchResultsDataSource = self;
这里面有两个点需要注意一下，一个是 myTableView.tableHeaderView = searchBar;这里是将searchbar放在对应列表的第一个section之中，而且section的高度不用设置，当然可以通过addsubview添加这种方式会产生一种移位，建议默认的方式比较好些！另一点是UISearchDisplayController是对searchbar的进一步封装，里面的东西确实简化了好多，可以采用这种方法设置取消按钮文本的颜色searchdispalyCtrl.searchBar.tintColor=BB_Yanzheng_Color;
第三步：相关委托的使用
我们通过实验发现点击searchbar的输入框会弹出一个独立的tableview视图，并显示一个取消按钮，搜索的数据显示在这个独立的视图列表中。而这个视图列表和普通的列表用法一样，需要设置
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
if (tableView == self.searchDisplayController.searchResultsTableView)
{
return 1;
}
else
{
return 26;
}
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if (tableView == self.searchDisplayController.searchResultsTableView)
{
NSLog(@"我去：%@",searchResult);
return [searchResult count];
}
else
{
if (section==0||section==1||section==2||section==3)
{
return 1;
}
if (isZiMu)
{
NSLog(@"zimugeshu:%@,%d",[zimuList objectAtIndex:section-4],[[cityGroupList objectForKey:[zimuList objectAtIndex:section-4]]count]);
return [[cityGroupList objectForKey:[zimuList objectAtIndex:section-4]]count];
}
/*
char mychar='a';
//当前字母
NSString *zimu=[NSString stringWithFormat:@"%c",mychar-32];
//NSString *zimu=[NSString stringWithFormat:@"%c",c];
if (![zimu isEqualToString:@"i"]&&![zimu isEqualToString:@"o"]&&![zimu isEqualToString:@"u"]&&![zimu isEqualToString:@"v"])
{
NSLog(@"zimugeshu:%@,%d",zimu,[[cityGroupList objectForKey:zimu]count]);
return [[cityGroupList objectForKey:[zimuList objectAtIndex:section-4]]count];
}*/
return 0;
}
}
-(CGFloat)tableView:(UITableView )tableView heightForRowAtIndexPath:(NSIndexPath )indexPath
{
if (tableView == self.searchDisplayController.searchResultsTableView)
{
return 45;
}
if (indexPath.section==0)
{
return 0;
}
if (indexPath.section==1||indexPath.section==2)
{
return 73;
}
if (indexPath.section==3)
{
//超过的话固定显示203
if (17+([remenCityList count]/3+1)47+18<=223)
{
if ([remenCityList count]!=0&&[remenCityList count]%3==0)
{
return 17+([remenCityList count]/3)47;
}
return 17+([remenCityList count]/3+1)*47;
}
return 223;
}
return 45;
}
(CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section
{
if (tableView == self.searchDisplayController.searchResultsTableView)
{
return 0;
}
if (section!=0)
{
return 32;
}
return 0.01f;
}-
(CGFloat)tableView:(UITableView )tableView heightForFooterInSection:(NSInteger)section
{
if (tableView == self.searchDisplayController.searchResultsTableView)
{
return 0.01;
}
return 0.01f;
}
这些个基本的高度和行数 模块信息，当然列表的显示更是必不可少
-(UITableViewCell)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
if (tableView == self.searchDisplayController.searchResultsTableView)
{
static NSString *simpleTableIdentifier = @"RecipeCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
if (cell == nil)
{
cell = [[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:simpleTableIdentifier]autorelease];
}
else
{
for(UIView *view in cell.contentView.subviews)
{
[view removeFromSuperview];
}
}
//cell.textLabel.text = [searchResult objectAtIndex:indexPath.row];
//[cell.textLabel setTextColor:BB_Red_Color];
//NSLog(@"zheli:%@,%d,%@",[searchResult objectAtIndex:indexPath.row],indexPath.row,self.searchDisplayController.searchResultsTableView);//城市名称 UILabel *labLeft = [[[UILabel alloc]init]autorelease]; labLeft.backgroundColor = [UIColor clearColor]; labLeft.textAlignment = NSTextAlignmentLeft; labLeft.font = [UIFont systemFontOfSize:15]; labLeft.textColor = [UIColor blackColor]; labLeft.frame = CGRectMake(15, 15, 200, 15); labLeft.text=[searchResult objectAtIndex:indexPath.row]; [cell.contentView addSubview:labLeft]; return cell;}
}
上面列出的只是显示信息，真正数据的搜索要依赖于下面的委托方法实现
pragma mark - UISearchDisplayDelegate
- (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString
{
[self filterContentForSearchText:searchString
scope:[self.searchBar scopeButtonTitles][self.searchBar.selectedScopeButtonIndex]];
NSLog(@"woshuoba:%@,%@,%d,%@",searchString,self.searchBar.scopeButtonTitles,self.searchBar.selectedScopeButtonIndex,[self.searchBar scopeButtonTitles][self.searchBar.selectedScopeButtonIndex]);
return YES;
}
-(void)filterContentForSearchText:(NSString)searchText scope:(NSString)scope
{
NSMutableArray *tempResults = [[[NSMutableArray array]init]autorelease];
NSMutableArray *tempResultsId = [[[NSMutableArray array]init]autorelease];
[tempResults removeAllObjects];
[tempResultsId removeAllObjects];
NSUInteger searchOptions = NSCaseInsensitiveSearch | NSDiacriticInsensitiveSearch;
NSLog(@"sousuo:%@,%@,%@",searchText,scope,storeResults);
for (int i = 0; i < storeResults.count; i++)
{
NSString *storeString = [[storeResults objectAtIndex:i]objectForKey:@"name"];
NSRange storeRange = NSMakeRange(0, storeString.length);
NSRange foundRange = [storeString rangeOfString:searchText options:searchOptions range:storeRange];
if (foundRange.length)
{
NSLog(@"foundRange:%d,%d",foundRange.length,foundRange.location);
[tempResults addObject:storeString];
[tempResultsId addObject:[[storeResults objectAtIndex:i]objectForKey:@"id"]];
}
NSLog(@"wodejieguo:%@,%@",[[storeResults objectAtIndex:i]objectForKey:@"id"],storeString);
}
//清空搜索内容Id
[self.searchResultId removeAllObjects];
[self.searchResult removeAllObjects];
[self.searchResultId addObjectsFromArray:tempResultsId];
[self.searchResult addObjectsFromArray:tempResults];
NSLog(@"searchResult:%@,%@",searchResult,searchResultId);
}
说道这里关于搜索条的使用已经基本完成，当然搜索列表选中跳页可以借助自定义委托来实现，这里就不多少了！
