xocde查找表視圖部分行詳細文本標籤

Question

我有一個索引與我的表設置，我能夠根據部分標題返回textLabel.text正確的數組。我的問題是我有一個單獨的數組，我需要在detailTextLabel.text中返回。

它只是從第一部分的第一個索引開始的每個部分重複。例如：

甲

蘋果

蘋果

鱷魚

鱷魚

乙

球

蘋果

蝙蝠

鱷魚

---

我已經生成索引字符和表頭。這是我必須返回單元格。

NSString *alphabet = [arrayIndex objectAtIndex:[indexPath section]]; 
      //---get all of First array's beginning with the letter--- 
      NSPredicate *predicate = 
      [NSPredicate predicateWithFormat:@"SELF beginswith[c] %@", alphabet]; 
      NSArray *firstArray = [First filteredArrayUsingPredicate:predicate]; 
      NSArray *secondArray = [Second filteredArrayUsingPredicate:predicate]; 

    if ([FirstArray count]>0) { 
     //---extract the relevant state from the states object--- 
     NSString *cellValue = [firstArray objectAtIndex:indexPath.row]; 



     //<--This line throws and error assuming it is trying to find the first letter to return the detail text --> 
    NSString *cellValueA = [secondArray objectAtIndex:indexPath.row]; 
//Returns value from first section and row in all section// 
      //NSString *cellValueA = [Second objectAtIndex:indexPath.row]; 
      cell.textLabel.text = cellValue; 
      cell.detailTextLabel.text = cellValueA; 
      cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator; 
     }  

如何找到第一個數組的匹配行以返回第二個數組中的正確索引。任何幫助將非常感激。謝謝:-)

---

全碼

-(void)loadSQL { 
    // Path to the database 
    NSString* dbPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"DATABASE_NAME.sqlite"]; 
    NSLog(@"databasePath: %@",dbPath); 
    sqlite3 *database; 
    NSString *firstString; 
    NSString *secondString; 

    // Open the database 
    if (sqlite3_open([dbPath UTF8String], &database) == SQLITE_OK) { 
     NSString *querySQL = [NSString stringWithFormat: 
           @"SELECT * FROM songs WHERE items LIKE %@ ", viewItems]; 

     const char *sql = [querySQL UTF8String]; 

     sqlite3_stmt *compiledStmt; 
     // Fetch all names 
     if (sqlite3_prepare_v2(database, sql, -1, &compiledStmt, NULL) == SQLITE_OK) { 
      // Append each name 
      while (sqlite3_step(compiledStmt) == SQLITE_ROW) { 

       const char* cFirst = (char*)sqlite3_column_text(compiledStmt, 2); 
         const char* cSecond = (char*)sqlite3_column_text(compiledStmt, 3); 

       if (cFirst == NULL) 
        // There should not be a NULL name 
        NSLog(@"Null name!!"); 

       else { 
       firstString = [NSString stringWithUTF8String:cName]; 
          secondString = [NSString stringWithUTF8String:cArtist]; 

       [First addObject:firstString]; 
       [Second addObject:secondString]; 


        //[First release]; 
        //[Second release]; 
       } 
      } 
      sqlite3_finalize(compiledStmt); // Cleanup the statement 
     } 
     else { 
      NSLog(@"Error retrieving data from database."); 
     } 
     sqlite3_close(database); 
    } 
    else { 
     NSLog(@"Error: Can't open database!"); 
    } 

//Creating section with 1st letter of the First field// 
    for (int i=0; i<[First count]-1; i++){ 
     //---get the first char of each state--- 
     char alphabet = [[First objectAtIndex:i] characterAtIndex:0]; 
     NSString *uniChar = [NSString stringWithFormat:@"%C", alphabet]; 
     //---add each letter to the index array--- 
     if (![arrayIndex containsObject:uniChar]) 
     { 
      [arrayIndex addObject:uniChar]; 
     } 
    }   
} 





#pragma mark Table view methods 

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { 
    if (searching) 
     return 1; 
    else 
     return [arrayIndex count]; 
} 

//---set the title for each section--- 
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section { 
    if (searching) 
     return nil; 

    else   
     return [arrayIndex objectAtIndex:section]; 
} 

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { 
    if (searching) 
     return([searchedFirst count]); 
    else{ 
     //return([First count]); 
     NSString *alphabet = [songIndex objectAtIndex:section]; 
     NSPredicate *predicate =[NSPredicate predicateWithFormat:@"SELF beginswith[c] %@", alphabet]; 
     NSArray *firstArray = [First filteredArrayUsingPredicate:predicate]; 
     return [firstArray count]; 

    } 
} 

//---set the index for the table--- 
- (NSArray *)sectionIndexTitlesForTableView:(UITableView *)tableView { 

    if (searching) { 
     return nil; 
    } 

    return arrayIndex; 
} 


//return the cell info 
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { 
    static NSString *CellIdentifier = @"Cell"; 

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; 
    if (cell == nil) 
     cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier] autorelease]; 

    if(searching) { 
     cell.textLabel.text = [searchedFirst objectAtIndex:indexPath.row]; 
     cell.detailTextLabel.text = [searchedSecond objectAtIndex:indexPath.row]; 
     cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator; 
    } 
    else{ 
     //---get the letter in the current section--- 
     NSString *alphabet = [arrayIndex objectAtIndex:[indexPath section]]; 
     //---get all states beginning with the letter--- 
     NSPredicate *predicate = 
     [NSPredicate predicateWithFormat:@"SELF beginswith[c] %@", alphabet]; 
     NSArray *firstArray = [First filteredArrayUsingPredicate:predicate]; 
     NSArray *secondArray = [Second filteredArrayUsingPredicate:predicate]; 

     if ([songArray count]>0) { 
      NSString *firstValue = [firstArray objectAtIndex:indexPath.row]; 
      NSString *secondValue = [secondArray objectAtIndex:indexPath.row]; 

      cell.textLabel.text = firtValue; 
      cell.detailTextLabel.text = secondValue; 
      cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator; 
     } 

    } 
    return cell; 


} 

Answer 1

我不知道我知道你需要什麼，但如果你是一個給定對象的數組中尋找索引，那麼你可以使用：

indexOfObject：

返回相應數組值等於給定對象的最小索引。

- (NSUInteger)indexOfObject:(id)anObject 

（ref）

Answer 2

接聽約改制意見的問題....

首先，創建一個自定義類：

// CellLabels.h 
#import <Foundation/Foundation.h> 

@interface CellLabels : NSObject 
@property (nonatomic, copy) NSString *firstText; 
@property (nonatomic, copy) NSString *secondText; 
@end 

//CellLabels.m 
#import "CellLabels.h" 

@implementation CellLabels 
@synthesize firstText = _firstText; 
@synthesize secondText = _secondText; 
@end 

代替First和Second，創建和初始化一個NSMutableArray叫cellData。替換...

[First addObject:firstString]; 
[Second addObject:secondString]; 

...與...

CellLabels *labels = [[CellLabels alloc] init]; 
labels.first = firstString; 
labels.second = secondString; 
[cellData addObject:labels]; 

然後，你的陣列通過比較 「SELF.firstText」 和你的數組引用作品的過濾工作，通過使用：

CellLabels *labels = [filteredArray objectAtIndex:indexPath.row]; 
cell.textLabel.text = labels.firstText; 
cell.detailTextLabel.text = labels.secondText; 

（好的，我沒有檢查確認所有編譯好的東西，但它應該給你提供這個想法。）