下面是我們要實現的效果。本效果是在上一篇自定義表視圖的基礎上進行更改的。

1.將Search bar and search display拖動到ViewController中。不要添加Search Bar.

2.修改ViewController的頭文件

Cpp代碼  

1. #import <UIKit/UIKit.h>  
2.   
3. @interface IkrboyViewController4 : UIViewController  
4. {  
5.     NSArray *dataArr;//用于顯示表視圖的數據  
6.     NSArray *allDataArr;//存儲所有數據，通過關鍵詞搜索將搜索結果賦值給dataArr  
7. }  
8. @PRoperty (weak, nonatomic) IBOutlet UISearchBar *searchBar;  
9.   
10. @end  

#import <UIKit/UIKit.h>@interface IkrboyViewController4 : UIViewController{    NSArray *dataArr;//用于顯示表視圖的數據    NSArray *allDataArr;//存儲所有數據，通過關鍵詞搜索將搜索結果賦值給dataArr}@property (weak, nonatomic) IBOutlet UISearchBar *searchBar;@end

 3.修改自定義方法initTableViewData。將ScopeBar隱藏是考慮到iphone的顯示高度問題。可自行決定。

Cpp代碼  

1. -(void)initTableViewData{  
2.     NSBundle *bundle = [NSBundle mainBundle];  
3.     NSString *plistPath = [bundle pathForResource:@"user_head" ofType:@"plist"];  
4.     allDataArr = [[NSArray alloc] initWithContentsOfFile:plistPath];  
5.     dataArr = [NSArray arrayWithArray:allDataArr];  
6.     NSLog(@"table data count = %d",[allDataArr count]);  
7.       
8.     //設定搜索欄ScopeBar隱藏  
9.     [self.searchBar setShowsScopeBar:NO];  
10.     [self.searchBar sizeToFit];  
11. }  

-(void)initTableViewData{    NSBundle *bundle = [NSBundle mainBundle];    NSString *plistPath = [bundle pathForResource:@"user_head" ofType:@"plist"];    allDataArr = [[NSArray alloc] initWithContentsOfFile:plistPath];    dataArr = [NSArray arrayWithArray:allDataArr];    NSLog(@"table data count = %d",[allDataArr count]);        //設定搜索欄ScopeBar隱藏    [self.searchBar setShowsScopeBar:NO];    [self.searchBar sizeToFit];}

4.添加SearchBar的三個事件觸發

Cpp代碼  

1. //以下三個方法實現SearchBar的搜索功能  
2. //當文本內容發生改變時候，向表視圖數據源發出重新加載消息  
3. - (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString  
4. {  
5.     [self filterContentForSearchText:searchString scope:self.searchBar.selectedScopeButtonIndex];  
6.     //YES情況下表視圖可以重新加載  
7.     return YES;  
8. }  
9.   
10. // 當Scope Bar選擇發送變化時候，向表視圖數據源發出重新加載消息  
11. - (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchScope:(NSInteger)searchOption  
12. {  
13.     [self filterContentForSearchText:self.searchBar.text scope:searchOption];  
14.     // YES情況下表視圖可以重新加載  
15.     return YES;  
16. }  
17.   
18. //點擊cancel按鈕的事件  
19. - (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar  
20. {  
21.     //查詢所有  
22.     [self filterContentForSearchText:@"" scope:-1];  
23. }  

//以下三個方法實現SearchBar的搜索功能//當文本內容發生改變時候，向表視圖數據源發出重新加載消息- (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString{    [self filterContentForSearchText:searchString scope:self.searchBar.selectedScopeButtonIndex];    //YES情況下表視圖可以重新加載    return YES;}// 當Scope Bar選擇發送變化時候，向表視圖數據源發出重新加載消息- (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchScope:(NSInteger)searchOption{    [self filterContentForSearchText:self.searchBar.text scope:searchOption];    // YES情況下表視圖可以重新加載    return YES;}//點擊cancel按鈕的事件- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar{    //查詢所有    [self filterContentForSearchText:@"" scope:-1];}

   5.自定義關鍵詞搜索功能

Cpp代碼  

1. //自定義搜索方法，根據關鍵詞從allDataArr中搜索到滿足搜索條件的元素，并將匹配的數組賦值給dataArr，由于dataArr是表視圖的數據源，因此表視圖的記錄也會隨之改變。  
2. - (void)filterContentForSearchText:(NSString*)searchText scope:(NSUInteger)scope;  
3. {  
4.     if([searchText length]==0)  
5.     {  
6.         //查詢所有  
7.         dataArr = [NSArray arrayWithArray:allDataArr];  
8.         NSLog(@"dataArr count = %d",[dataArr count]);  
9.         return;  
10.     }  
11.       
12.     NSPredicate *scopePredicate;  
13.       
14.     switch (scope) {  
15.         case 0:  
16.             scopePredicate = [NSPredicate predicateWithFormat:@"(SELF.itemName contains[c] %@) OR (SELF.itemImagePath contains[c] %@)",searchText,searchText];  
17.             NSLog(@"searchText=%@",searchText);  
18.             dataArr =[NSArray arrayWithArray:[allDataArr filteredArrayUsingPredicate:scopePredicate]];  
19.             break;  
20.         case 1:  
21.             scopePredicate = [NSPredicate predicateWithFormat:@"SELF.itemName contains[c] %@",searchText];  
22.             dataArr = [NSArray arrayWithArray:[allDataArr filteredArrayUsingPredicate:scopePredicate]];  
23.             break;  
24.         case 2:  
25.             scopePredicate = [NSPredicate predicateWithFormat:@"SELF.itemImagePath contains[c] %@",searchText];  
26.             dataArr =[NSArray arrayWithArray:[allDataArr filteredArrayUsingPredicate:scopePredicate]];  
27.             break;  
28.     }  
29. }  

//自定義搜索方法，根據關鍵詞從allDataArr中搜索到滿足搜索條件的元素，并將匹配的數組賦值給dataArr，由于dataArr是表視圖的數據源，因此表視圖的記錄也會隨之改變。- (void)filterContentForSearchText:(NSString*)searchText scope:(NSUInteger)scope;{    if([searchText length]==0)    {        //查詢所有        dataArr = [NSArray arrayWithArray:allDataArr];        NSLog(@"dataArr count = %d",[dataArr count]);        return;    }        NSPredicate *scopePredicate;        switch (scope) {        case 0:            scopePredicate = [NSPredicate predicateWithFormat:@"(SELF.itemName contains[c] %@) OR (SELF.itemImagePath contains[c] %@)",searchText,searchText];            NSLog(@"searchText=%@",searchText);            dataArr =[NSArray arrayWithArray:[allDataArr filteredArrayUsingPredicate:scopePredicate]];            break;        case 1:            scopePredicate = [NSPredicate predicateWithFormat:@"SELF.itemName contains[c] %@",searchText];            dataArr = [NSArray arrayWithArray:[allDataArr filteredArrayUsingPredicate:scopePredicate]];            break;        case 2:            scopePredicate = [NSPredicate predicateWithFormat:@"SELF.itemImagePath contains[c] %@",searchText];            dataArr =[NSArray arrayWithArray:[allDataArr filteredArrayUsingPredicate:scopePredicate]];            break;    }}

 6.修改cellForRowAtIndexPath方法

Cpp代碼  

1. - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath  
2. {  
3.     static NSString *CellIdentifier = @"myTableCell";  
4.     MyTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];  
5.     //add code begin:important,for showing searching results  
6.     //不對cell進行空值的判斷，會導致在搜索時，找不到對應identifier的cell而報錯。  
7.     if (cell == nil) {  
8.     //搜索結果采用簡單表視圖cell的style，并非自定義的表視圖cell的style      
9.     cell = [[MyTableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];  
10.         NSUInteger row = [indexPath row];  
11.         NSDictionary *rowDict = [dataArr objectAtIndex:row];  
12.         cell.textLabel.text =  [rowDict objectForKey:@"itemName"];  
13.         NSString *imagePath = [rowDict objectForKey:@"itemImagePath"];  
14.         cell.imageView.image =  [UIImage imageNamed:imagePath];  
15.     }  
16.     //add code end  
17.   
18.     NSUInteger row = [indexPath row];  
19.     NSDictionary *rowDict = [dataArr objectAtIndex:row];  
20.     cell.label.text =  [rowDict objectForKey:@"itemName"];  
21.     NSLog(@"cell.label.text =  %@",[rowDict objectForKey:@"itemName"]);  
22.       
23.     NSString *imagePath = [rowDict objectForKey:@"itemImagePath"];  
24.     cell.image.image = [UIImage imageNamed:imagePath];  
25.     NSLog(@"cell.image.image  =  %@",imagePath);  
26.       
27.     cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;  
28.       
29.     return cell;  
30. }  

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{    static NSString *CellIdentifier = @"myTableCell";    MyTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];    //add code begin:important,for showing searching results    //不對cell進行空值的判斷，會導致在搜索時，找不到對應identifier的cell而報錯。    if (cell == nil) {    //搜索結果采用簡單表視圖cell的style，并非自定義的表視圖cell的style        cell = [[MyTableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];        NSUInteger row = [indexPath row];        NSDictionary *rowDict = [dataArr objectAtIndex:row];        cell.textLabel.text =  [rowDict objectForKey:@"itemName"];        NSString *imagePath = [rowDict objectForKey:@"itemImagePath"];        cell.imageView.image =  [UIImage imageNamed:imagePath];    }    //add code end    NSUInteger row = [indexPath row];    NSDictionary *rowDict = [dataArr objectAtIndex:row];    cell.label.text =  [rowDict objectForKey:@"itemName"];    NSLog(@"cell.label.text =  %@",[rowDict objectForKey:@"itemName"]);        NSString *imagePath = [rowDict objectForKey:@"itemImagePath"];    cell.image.image = [UIImage imageNamed:imagePath];    NSLog(@"cell.image.image  =  %@",imagePath);        cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;        return cell;}