UIGestureRecognizer 在 UIImageView 上无法正常工作

Posted 2023-03-11

【中文标题】UIGestureRecognizer 在 UIImageView 上无法正常工作

【英文标题】：UIGestureRecognizer not working properly on UIImageView

【发布时间】：2015-09-29 07:36:57

【问题描述】：

简介：- 在我的项目中，我在自定义 TableViewCell(videoTableViewCell.h) 中包含的 UIImageView 上使用 UITapGestureRecognizer。我添加了一个 tapGesture 和 longPressGesture 来执行一些操作。看到这个Question 我启用了 userInteraction.than 我收到了来自 cell.image2_2 和 cell.image1_1 的回复。问题：- 但 cell.image1_2 没有在 tapGesture 或 longPressGesture 上回复。注意： image1_2 和 image2_2 在一个单元格中（重用标识符 two），而 image1_1 在另一个单元格中（重用标识符 one）宏

  RADIOUS 16.0
  TITLE_COLOR [UIColor colorWithRed:102.0/255.0 green:255.0/255.0 blue:0/255.0 alpha:1]

videoViewController.m -->UITableView 数据源方法

-(void)tableView:(UITableView *)tableView willDisplayCell:(videoTableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
    UITapGestureRecognizer* tapGesture = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(Action:)];
    tapGesture.numberOfTapsRequired = 1;
    UILongPressGestureRecognizer* longPress = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(handleLongPress:)];
    if(indexPath.row%2 == 0)//cell with two boxes
        NSArray* array = [newArray objectAtIndex:indexPath.row];
        if(array.count > 1)//WHEN CONATAINS TWO OBJECTS in Array
            NSString* string = [array objectAtIndex:0];
            if(string)
                cell.image1_2.hidden = NO;
            else
                cell.image1_2.hidden = YES;
            
            [cell.image1_2 setImage:[self getThumbNailByName:string]];
            NSString*tag = [NSString stringWithFormat:@"%ld%ld",indexPath.row,(long)0];
            cell.image1_2.tag = [tag integerValue];
            [cell.image1_2 addGestureRecognizer:tapGesture];
            if(selectionEnabled)
                if([selectedItems containsObject:[NSNumber numberWithInteger:[tag integerValue]]])
                    cell.image1_2.layer.borderWidth = 1.0;
                    cell.image1_2.layer.borderColor = TITLE_COLOR.CGColor;
                else
                    cell.image1_2.layer.borderColor = [UIColor clearColor].CGColor;
                    cell.image1_2.layer.borderWidth = 0;
                
            else
                [cell.image1_2 addGestureRecognizer:longPress];
            

            string = [array objectAtIndex:1];
            if(string)
                cell.image2_2.hidden = NO;
            else
                cell.image2_2.hidden = YES;
            
            [cell.image2_2 setImage:[self getThumbNailByName:string]];
            tag = [NSString stringWithFormat:@"%ld%ld",indexPath.row,(long)1];
            cell.image2_2.tag = [tag integerValue];
            [cell.image2_2 addGestureRecognizer:tapGesture];
            if(selectionEnabled)
                if([selectedItems containsObject:[NSNumber numberWithInteger:[tag integerValue]]])
                    cell.image2_2.layer.borderWidth = 1.0;
                    cell.image2_2.layer.borderColor = TITLE_COLOR.CGColor;
                else
                    cell.image2_2.layer.borderColor = [UIColor clearColor].CGColor;
                    cell.image2_2.layer.borderWidth = 0;
                
            else
               [cell.image2_2 addGestureRecognizer:longPress];
            
        else// WHEN CONATAINS ONLY ONE OBJECT in Array
            NSString* string = [array objectAtIndex:0];
            if(string)
                cell.image1_2.hidden = NO;
            else
                cell.image1_2.hidden = YES;
            
            NSString*tag = [NSString stringWithFormat:@"%ld%ld",indexPath.row,(long)0];
            cell.image1_2.tag = [tag integerValue];
            [cell.image1_2 addGestureRecognizer:tapGesture];
            cell.image2_2.hidden = YES;
            if(selectionEnabled)
                if([selectedItems containsObject:[NSNumber numberWithInteger:[tag integerValue]]])
                    cell.image1_2.layer.borderWidth = 1.0;
                    cell.image1_2.layer.borderColor = TITLE_COLOR.CGColor;
                else
                    cell.image1_2.layer.borderColor = [UIColor clearColor].CGColor;
                    cell.image1_2.layer.borderWidth = 0;
                
            else
                [cell.image1_2 addGestureRecognizer:longPress];
            
        
    else//cell with one box
        NSString* string = [[newArray objectAtIndex:indexPath.row] objectAtIndex:0];
        if(string)
            cell.image1_1.hidden = NO;
        else
            cell.image1_1.hidden = YES;
        
        [cell.image1_1 setImage:[self getThumbNailByName:string]];
        NSString*tag = [NSString stringWithFormat:@"%ld%ld",indexPath.row,(long)0];
        cell.image1_1.tag = [tag integerValue];
        [cell.image1_1 addGestureRecognizer:tapGesture];
        if(selectionEnabled)
            if([selectedItems containsObject:[NSNumber numberWithInteger:[tag integerValue]]])
                cell.image1_1.layer.borderWidth = 1.0;
                cell.image1_1.layer.borderColor = TITLE_COLOR.CGColor;
            else
                cell.image1_1.layer.borderColor = [UIColor clearColor].CGColor;
                cell.image1_1.layer.borderWidth = 0;
            
        else
            [cell.image1_1 addGestureRecognizer:longPress];
        
    

videoTableViewCell.m

- (void)awakeFromNib

    // Initialization code
    [image1_1 setUserInteractionEnabled:YES];
    [image1_2 setUserInteractionEnabled:YES];
    [image2_2 setUserInteractionEnabled:YES];
    if([self.reuseIdentifier isEqualToString:@"one"])
        image1_1.layer.cornerRadius = RADIOUS;
        image1_1.clipsToBounds = YES;
    else
        //Two Album Cell'cell2'
        image1_2.layer.cornerRadius = RADIOUS;
        image1_2.clipsToBounds = YES;
        image2_2.layer.cornerRadius = RADIOUS;
        image2_2.clipsToBounds = YES;
    

如果有人需要更多信息，请问我。 顺便说一下，谢谢关注。

【参考方案1】：

所以我终于明白了。 问题是我正在创建一个 UITapGestureRecognizer 和 UILongPressGestureRecognizer 对象并将其用于多个对象。

所以，这是解决方案.. 为每个对象使用新的UIGestureRecognizer，如下所示：

UITapGestureRecognizer* tapGesture1 = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(Action:)];
    tapGesture1.numberOfTapsRequired = 1; 
[cell.image1_1 addGestureRecognizer:tapGesture1];

UITapGestureRecognizer* tapGesture2 = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(Action:)];
    tapGesture2.numberOfTapsRequired = 1; 
[cell.image1_2 addGestureRecognizer:tapGesture2];

UITapGestureRecognizer* tapGesture3 = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(Action:)];
        tapGesture3.numberOfTapsRequired = 1; 
    [cell.image2_2 addGestureRecognizer:tapGesture3];
//do same for UILogPressGestureRecognizer