Question

我在数据库中有产品表。产品表我有id＆amp; product_image列。每个图像都有id。我从数据库中获取这些id并被带到cat_imageidArray，然后获取图像＆amp;被带到productimg_array。将productimg_array图像值分配给imgView1（UIButton）。我正在使用[productimg_array objectAtIndex：i]。这里的索引是0到7或者等等。但cat_imageidArray的值为183,184,190等。当我点击imgView1按钮时，我收到这些错误[__NSArrayM objectAtIndex：]：索引197超出界限[0 .. 8]。我明白问题是数组值不匹配。如何将cat_imageidArray值分配给productimg_array索引。也许它会起作用。

const char *sql = "SELECT id,cat_id,product_image,order_by,description FROM product where cat_id = ?";

        NSLog(@"sql is %s",sql);

        sqlite3_stmt *statement;

        if (sqlite3_prepare_v2(database, sql, -1, &statement, NULL) == SQLITE_OK) {
            // We "step" through the results - once for each row.

            if (sqlite3_bind_int(statement, 1, categoryId) != SQLITE_OK)
                NSLog(@"%s: bind failed: %s", __FUNCTION__, sqlite3_errmsg(database));

            while (sqlite3_step(statement) == SQLITE_ROW) {

                cat_iamgeId = sqlite3_column_int(statement, 0);
                NSLog(@"cat_iamgeId is %ld",(long)cat_iamgeId);
                [cat_imageidArray addObject:@(cat_iamgeId)];

                product_image = [[NSString alloc] initWithUTF8String:
                                 (const char *) sqlite3_column_text(statement, 2)];
                NSLog(@"product_image is %@",product_image);
                [productimg_array addObject:product_image];                    
            }
        }


for (int i = 0; i<[productimg_array count]; i++ ) {

            NSLog(@"productimg_array_index %@", productimg_array[i]);
            imgView1=[[UIButton alloc]initWithFrame:CGRectMake(20+(i*74), 0, 72, 72)];
            Width = Width + 20+(i*74);
            for (int i=0; i<[cat_imageidArray count]; i++){

               NSLog(@"index %@", cat_imageidArray[i]);
               tag=[[cat_imageidArray objectAtIndex:i]intValue];
               imgView1.tag=tag;
               NSLog(@"tag is %d",tag);
            }

            [imgView1 addTarget:self action:@selector(dbsofaClicked:) forControlEvents:UIControlEventTouchUpInside];
            [imgView1 setImageWithURL:[NSURL URLWithString:[productimg_array objectAtIndex:i]]forState:UIControlStateNormal];

           [scrollview addSubview:imgView1];
       }        


imgView1 button click:

-(void)dbsofaClicked:(id)sender{

   NSLog(@"button %d is clicked.", [sender tag]);            
             mmageView=[[UIImageView alloc]initWithFrame:CGRectMake(50,50,150,150)];

    [mmageView setUserInteractionEnabled:YES];

       [mmageView setImageWithURL:[NSURL URLWithString:[productimg_array objectAtIndex:[sender tag]]] placeholderImage:nil options:SDWebImageProgressiveDownload completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType) {

    }];

NSLog productimg_array：

productimg_array (
"http://center.net/projects/View/images/img.png",
"http://center.net/projects/View/images/img1.png",
"http://center.net/projects/View/images/img2.png",
"http://center.net/projects/View/images/img3.png",
"http://center.net/projects/View/images/img4.png",
"http://center.net/projects/View/images/img5.png",
"http://center.net/projects/View/images/img6.png",
"http://center.net/projects/View/images/img7.png",
"http://center.net/projects/View/images/img8.png"
)

当我使用singleTap时，我没有从数据库值中获得正确的描述。这就是为什么我需要设置id而不是索引

- (void)singleTap:(UIGestureRecognizer *)singletap {
  NSLog(@"singleTap1");
    UIView *view = singletap.view;
    switch (view.tag) {
        case 0:

            txtt=[[UITextView alloc]initWithFrame:CGRectMake(50, 100, 200, 100)];

            txtt.text=[descript_array objectAtIndex:0];

            txtt.editable=NO;

            NSLog(@"text is %@",txtt.text);

            [self.view addSubview:txtt];





            break;

        case 1:


            txtt1=[[UITextView alloc]initWithFrame:CGRectMake(50, 100, 200, 100)];

            txtt1.text=[descript_array objectAtIndex:1];

            NSLog(@"text1 is %@",txtt1.text);

            [self.view addSubview:txtt1];



            break;

        case 2:

            txtt2=[[UITextView alloc]initWithFrame:CGRectMake(50, 100, 200, 100)];

            txtt2.text=[descript_array objectAtIndex:2];

            NSLog(@"text2 is %@",txtt2.text);

            [self.view addSubview:txtt2];



            break;

        case 3:

            txtt3=[[UITextView alloc]initWithFrame:CGRectMake(50, 100, 200, 100)];

            txtt3.text=[descript_array objectAtIndex:3];

            NSLog(@"text is %@",txtt3.text);

            [self.view addSubview:txtt3];




            break;

Answer 1

删除解决问题的内部for循环

for (int i = 0; i<[productimg_array count]; i++ ) {

        NSLog(@"productimg_array_index %@", productimg_array[i]);
        imgView1=[[UIButton alloc]initWithFrame:CGRectMake(20+(i*74), 0, 72, 72)];
        Width = Width + 20+(i*74);
        //for (int i=0; i<[cat_imageidArray count]; i++){ **This line doesn't need**

           NSLog(@"index %@", cat_imageidArray[i]);
           tag=[[cat_imageidArray objectAtIndex:i]intValue];
           **Changed**//imgView1.tag=tag; 
           imgView1.tag = i;
           NSLog(@"tag is %d",tag);
        //}

        [imgView1 addTarget:self action:@selector(dbsofaClicked:) forControlEvents:UIControlEventTouchUpInside];
        [imgView1 setImageWithURL:[NSURL URLWithString:[productimg_array objectAtIndex:i]]forState:UIControlStateNormal];

       [scrollview addSubview:imgView1];
   }

[__NSArrayM objectAtIndex：]：索引197超出界限[0 .. 8]

1 个答案: