ios - 图像在iOS中自动消失

Question

当我单击表格单元格时，使用以下代码显示图像imageview。它显示图像，但在1毫秒内消失。
谁能帮我做到这一点。

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    BeaconAdViewController *imageVC = [[BeaconAdViewController alloc] init];
    self.tempImg.image = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:fullImg]]];
    imageVC.tempImg.image = self.tempImg.image;
    imageVC.view.userInteractionEnabled=YES;

    UITapGestureRecognizer *tapGR = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(dismiss)];
    [imageVC.view addGestureRecognizer:tapGR];
    [self presentViewController:imageVC animated:YES completion:nil];
}

-(void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
    //self.fullImg = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:fullImg]]];
    self.tempImg.image = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:fullImg]]];
}

-(void)dismiss
{
     [self dismissViewControllerAnimated:YES completion:nil];
}

提前致谢。

Answer 1

尝试这样做:

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    BeaconAdViewController *imageVC = [[BeaconAdViewController alloc] init];
    // Change the below
    // self.tempImg.image = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:fullImg]]];
    UIImage *theImage = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:fullImg]]];
    imageVC.tempImg.image = theImage;
    imageVC.view.userInteractionEnabled=YES;

    UITapGestureRecognizer *tapGR = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(dismiss)];
    [imageVC.view addGestureRecognizer:tapGR];
    [self presentViewController:imageVC animated:YES completion:nil];
}

-(void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
    //self.fullImg = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:fullImg]]];
    self.tempImg.image = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:fullImg]]];
}

-(void)dismiss
{
     [self dismissViewControllerAnimated:YES completion:nil];
}