Uipicker碰撞紡絲2個部件simultaneuosly

Question

在下面的代碼時將創建一個碰撞，如果我的同時旋轉2個組件偶爾取決於選擇哪些陣列，該值將是出界

我需要一些條件檢查其將停止崩潰，但不知道什麼如何

任何人都可以建議適當的代碼將處理條件，避免碰撞

感謝

- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{ 

    // Only calls the following code if component "0" has changed. 
     if (component == 0) 
     { 

      // Sets the global integer "component0Row" to the currently selected row of component "0" 
      component0Row = row; 

      // Loads the new values for the selector into a new array in order to reload the data. 
      NSDictionary *newDict = [[NSDictionary alloc]initWithDictionary:[pickerData objectForKey:[Letters objectAtIndex:component0Row]]]; 

      NSArray *sortArray = [[NSArray alloc]initWithArray:[newDict allKeys]]; 

      NSMutableArray *newValues = [[NSMutableArray alloc]initWithArray:[sortArray sortedArrayUsingSelector:@selector(localizedStandardCompare:)]]; 

      self.Numbers = newValues; 

      component1Row = 0; 
      [self.myPicker selectRow:0 inComponent:1 animated:NO]; 

      [newDict release]; 
      [sortArray release]; 
      [newValues release]; 
     } 
     if(component ==1) 
     { 
      component0Row = [pickerView selectedRowInComponent:0]; 
      component1Row =row; 
     } 
} 

Answer 1

問題可能在titleForRow方法或numberOfRows方法。你必須確保你沒有超出所討論陣列的範圍。