问更改自定义表视图单元格的图像

EN

#import "BestQuestionListVC.h"
#import "BestQuestionListCell.h"

@interface BestQuestionListVC () <UITableViewDelegate, UITableViewDataSource>{
    NSArray *arrQuesList;
    NSArray *arrAuthorList;
    NSMutableArray *arrMutBtnSelected; // arrMut of bools, containing true/false of button as selected or not.

}

@property (strong, nonatomic) IBOutlet UITableView *tblBestQuestion;


@end

@implementation BestQuestionListVC

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.

    // creating temp array of data
    arrQuesList     = @[@"ques #1", @"ques #2", @"ques #3", @"ques #4", @"ques #5", @"ques #6", @"ques #7", @"ques #8" ];
    arrAuthorList   = @[@"Author #1", @"Author #2", @"Author #3", @"Author #4", @"Author #5", @"Author #6", @"Author #7", @"Author #8" ];

    arrMutBtnSelected = [NSMutableArray new];  // alloc Mutable array

    // array of bools, initially all false as not any button is selected
    for (int i=0; i < arrQuesList.count; i++) {
        [arrMutBtnSelected addObject:[NSNumber numberWithBool:false]];
    }

    // for initially first button is selected.
    [arrMutBtnSelected replaceObjectAtIndex:0 withObject:[NSNumber numberWithBool:true]];

}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (IBAction)btnStarClicked:(UIButton *)sender {
    // If one button is selected at one time
    // start
    /*
         [arrMutBtnSelected removeAllObjects];
         for (int i=0; i < arrQuesList.count; i++) {
         [arrMutBtnSelected addObject:[NSNumber numberWithBool:false]];
         }
         [arrMutBtnSelected replaceObjectAtIndex:sender.tag withObject:[NSNumber numberWithBool:true]];
    */
    // end

    // if user can selects multiple buttons
    // start
    /*
        if (sender.selected) {
            [arrMutBtnSelected replaceObjectAtIndex:sender.tag withObject:[NSNumber numberWithBool:false]];
        }
        else{
            [arrMutBtnSelected replaceObjectAtIndex:sender.tag withObject:[NSNumber numberWithBool:true]];
    }
    */
    // end

    [self.tblBestQuestion reloadData];
}


#pragma mark - TableViewDelegate

-(CGFloat)tableView:(UITableView *)tableView estimatedHeightForRowAtIndexPath:(NSIndexPath *)indexPath{
    return UITableViewAutomaticDimension;
}

-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
    return UITableViewAutomaticDimension;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    return arrQuesList.count;
}


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    BestQuestionListCell *quesCell = [tableView dequeueReusableCellWithIdentifier:@"BestQuestionListCell"];

    quesCell.lblQuestion.text   = arrQuesList[indexPath.row];
    quesCell.lblAuthor.text     = arrAuthorList[indexPath.row];
    quesCell.btnStar.tag = indexPath.row ;

    if (arrMutBtnSelected[indexPath.row] == [NSNumber numberWithBool:true]) {
        quesCell.btnStar.selected = true;
    }
    else{
        quesCell.btnStar.selected = false;
    }

    return quesCell;
}

@end

  //you could write only
 [mainCell setSelected:YES animated:YES];

First set the IBOutLet in the tableViewCell.

UIImage *imageSelected = [UIImage imageNamed:@"your selected img name"];
UIImage *imageNotSelected = [UIImage imageNamed:@"your not selected img name"];
[cell.yourBtnName setImage:imageNotSelected forState:UIControlStateNormal];
[cell.yourBtnName setImage:imageSelected forState:UIControlStateSelected];

[cell.yourBtnName addTarget:self action:@selector(yourBtnClickMethod:) forControlEvents:UIControlEventTouchUpInside];

-(void)yourBtnClickMethod:(UIButton *)btn{
    btn.selected = !btn.selected;
}