UISlider值在UITable View Cell中滚动时自动分配

3 回答

• 0

  使用 NSMutableDictionary 保存滑块的值然后从 cellForRowAtIndexPath 方法更新它我发布更改只需在项目中进行更改

  在 ViewCOntroller.h 文件中

  #import <UIKit/UIKit.h>
  #import "CustomeTableViewCell.h"
  
  @interface ViewController : UIViewController <UITableViewDataSource ,UITableViewDelegate,SliderDelegate>//confirms to delegate
  {
    //NSArray *tableList;
    UITableView *mytableview;
    NSInteger SliderChangeValue;
  
  }
  
  @property (strong , nonatomic) IBOutlet UIView *tableDemo;
  @property (strong , nonatomic) NSMutableArray *arrSlider;
  @property (strong,  nonatomic) NSMutableDictionary *sliderDicValues; //add a mutable dictionary 
  @property (weak, nonatomic) IBOutlet UITableView *myTableView;//add outlet to tableview
  
  @end
  

  在 ViewController.m 文件中

  #import "ViewController.h"
  
  @interface ViewController ()
  
  @end
  
  @implementation ViewController
  
  @synthesize arrSlider;
  @synthesize sliderDicValues;
  
  - (void)viewDidLoad  
  {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    //    tableList = [NSArray arrayWithObjects:
    //                 @"Cell 1",@"Cell 2",@"Cell 3",@"Cell 4",@"Cell 5",
    //                 @"Cell 6",@"Cell 7",@"Cell 8",@"Cell 9",@"Cell 10",
    //                 @"Cell 11",@"Cell 12",@"Cell 13",@"Cell 14",@"Cell 15",
    //                 @"Cell 16",@"Cell 17",@"Cell 18",@"Cell 19",@"Cell 20",
    //                 nil];
  
     arrSlider = [[NSMutableArray alloc]init];
     sliderDicValues = [[NSMutableDictionary alloc]init]; //initilise an mutable dictionary
    //[mytableview registerClass:[CustomeTableViewCell class]       forCellReuseIdentifier:@"Cell"];
  }
  
  - (void)didReceiveMemoryWarning
  {
     [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
  }
  
  -(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
  
   //[tableList count] 
    return 15;
   }
  
   -(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
  {
     static NSString *simpleTableCell = @"Cell";
     CustomeTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableCell];
     if (cell == nil) {
        cell = [[CustomeTableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:simpleTableCell];
     }
     if([self.sliderDicValues objectForKey:[NSString stringWithFormat:@"%d",indexPath.row]]) //check if there is any slided value is present
     {
       NSNumber *value = [self.sliderDicValues objectForKey:[NSString stringWithFormat:@"%d",indexPath.row]];
       [cell.mySlider setValue:value.integerValue]; //set the slider value
       [cell.myCellLabel setText:[NSString stringWithFormat:@"%d",value.integerValue]];//and also label
     }
     else //set to default values
     {
        [cell.mySlider setValue:(NSInteger)0];
        [cell.myCellLabel setText:@"label"];
     }
     //add a single target don't add double target to slider 
     cell.sliderDelegate = self;//set the delegate
     return cell;
  /*
   NSString *strName = [NSString stringWithFormat:@"Cell : %d",indexPath.row];
   NSLog(@"strName :%@ , SliderValue : %d",strName , (int)cell.mySlider.value);
   for (int i = 0; i < arrSlider.count; i++) {
       NSString *strTag = [NSString stringWithFormat:@"%@",[[arrSlider objectAtIndex:i]valueForKey:@"tag"]];
       NSString *myIndexPath = [NSString stringWithFormat:@"%d",indexPath.row];
  
       if([strTag isEqualToString:myIndexPath])
       {
           NSString *strValue = [NSString stringWithFormat:@"%@",[[arrSlider objectAtIndex:i]valueForKey:@"value"]];
  
           cell.mySlider.value = [strValue floatValue];
           NSLog(@"Tag Value : %@ , value %f", strTag , [strValue floatValue]);    
       }
  
       if ([strTag isEqual:myIndexPath]) {
           //NSString *strValue = [NSString stringWithFormat:@"%@",[[arrSlider objectAtIndex:i]objectForKey:@"value"]];
           //NSLog(@"%@",strValue);
           NSLog(@"Hello");
           //cell.mySlider.value =
       }
   }
   [cell.btnCell setTitle:strName forState:UIControlStateNormal];
   cell.btnCell.tag = indexPath.row;
   cell.mySlider.tag = indexPath.row;
   [cell.mySlider addTarget:self action:@selector(customSliderValue:) forControlEvents:UIControlEventValueChanged];
   [cell.btnCell addTarget:self action:@selector(customeBtnClicked:) forControlEvents:UIControlEventTouchDown];
   */
  }
  
  //delegate method called from custom cell 
  - (void)sliderChanged:(CustomeTableViewCell *)cell
  {
     NSIndexPath *path = [_myTableView indexPathForCell:cell]; //get the indexpath
     if(path)//check if valid path
     {
        SliderChangeValue = cell.mySlider.value;
        [self.sliderDicValues setObject:[NSNumber numberWithInt:SliderChangeValue] forKey:[NSString stringWithFormat:@"%d",path.row]]; //set the value in the dictionary later used in the cellForRowAtIndexPath method
     }
     //     SliderChangeValue = (int)sender.value;
          NSLog(@"%d",SliderChangeValue);
  }
  
  
   //dont use it
   -(void)customSliderValue:(UISlider *)sender{
  
   //    NSString *value =[NSString stringWithFormat:@"%d" ,(int)sender.value];
   //    NSString *tag = [NSString stringWithFormat:@"%d", (int)sender.tag];
   //    
   //    NSLog(@"%@ %@",value , tag);
   //    
   //    [self.dicSilder setObject:value forKey:@"value"];
   //    [self.dicSilder setObject:tag forKey:@"tag"];
   //    
   //    [self.arrSlider addObject:self.dicSilder]; 
   //    NSLog(@"%@",self.arrSlider);
  
  
      SliderChangeValue = (int)sender.value;
  
      NSLog(@"%d",SliderChangeValue);
  
   }
  
   //this is also put a delegate from the cell like slider , just add the another method in the protocol and perform action, if u don't get just comment i will update the code and u hav t modify this method according to your requirement
   -(void)customeBtnClicked:(UIButton *)sender
   { 
      NSString *value =[NSString stringWithFormat:@"%d" ,SliderChangeValue];
      NSString *tag = [NSString stringWithFormat:@"%d", sender.tag];
  
      //NSLog(@"%@ %@",value,tag);
      NSMutableDictionary *dic = [[NSMutableDictionary alloc]init];
      [dic setObject:value forKey:@"value"];
      [dic setObject:tag forKey:@"tag"];
  
      //NSLog(@"%@",dic);
  
      [arrSlider addObject:dic];
  
  
       NSLog(@"%@",arrSlider);
  
       NSString *sliderTagAtIndexPath = @"";
      //NSString *sliderValueAtindexPath = @"";
  
       for (int i = 0; i < arrSlider.count; i++) {
  
       NSString *strTag = [NSString stringWithFormat:@"%@",[[arrSlider objectAtIndex:i]valueForKey:@"tag"]];
  
        if([strTag isEqualToString:tag])
        {       
          //NSString *strValue = [NSString stringWithFormat:@"%@",[[arrSlider objectAtIndex:i]valueForKey:@"value"]];
  
          sliderTagAtIndexPath = strTag;
          //sliderValueAtindexPath = strValue; 
       }
      }
      UIAlertView *myAlertView = [[UIAlertView alloc]initWithTitle:@"Clicked"
                                                       message:[NSString stringWithFormat:@"Cell : %@ Value: %d", sliderTagAtIndexPath ,SliderChangeValue]
                              //message:[NSString stringWithFormat:@"Cell : %@ Value: %@", sliderTagAtIndexPath ,sliderValueAtindexPath]
                                                      delegate:self
                                             cancelButtonTitle:@"OK"
                                             otherButtonTitles:nil];
  
      [myAlertView show];
  
  }
  @end
  

  在 CustomeTableViewCell.h 文件中

  #import <UIKit/UIKit.h>
  //add a custom delegate
  @protocol SliderDelegate<NSObject>
  - (void)sliderChanged:(id)self;
  @end
  
  @interface CustomeTableViewCell : UITableViewCell
  
  @property (weak, nonatomic) IBOutlet UILabel *myCellLabel;
  @property (weak, nonatomic) IBOutlet UISlider *mySlider;
  @property (weak, nonatomic) IBOutlet UIButton *btnCell;
  @property (weak, nonatomic) id <SliderDelegate>sliderDelegate;
  
   - (IBAction)sliderValuechanged:(UISlider *)sender;
  
  @end
  

  在 CustomeTableViewCell.m 文件中

  #import "CustomeTableViewCell.h"
  
   @implementation CustomeTableViewCell
  
   - (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
   {
      self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
      if (self) {
       // Initialization code
      }
      return self;
  }
  
  - (void)awakeFromNib
  {
     // Initialization code
  }
  
  - (void)setSelected:(BOOL)selected animated:(BOOL)animated
  {
      [super setSelected:selected animated:animated];
  
      // Configure the view for the selected state
  }
  
  - (IBAction)sliderValuechanged:(UISlider *)sender
  {
     self.myCellLabel.text = [NSString stringWithFormat:@"%d",(NSInteger)sender.value];
     //call the custom delegate each time when slider is slided
     if([_sliderDelegate respondsToSelector:@selector(sliderChanged:)])
     {
         [_sliderDelegate sliderChanged:self]; //passing the entire cell itself
     } 
  }
  @end
  

  希望这有助于你.. :)

  回复于 2024-04-27T17:19:08+08:00
• 3

  您不需要检查（设置）Cell的所有数据源，我的意思是， No need of for loop inside the cellForRowAtIndexPath . just remove it and will work fine .

  回复于 2024-04-27T17:19:08+08:00
• 0

  试试这个适用于我的代码：

  - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
  {
  
  
     NSString *identifier = [NSString stringWithFormat:@"%d",indexPath.row];
      CustomeTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];
      if (!cell) {
          cell = [[CustomeTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier];
      }
  // Write your rest code here
  return cell;
  
  
  }
  

  回复于 2024-04-27T17:19:08+08:00