Question

我是关于目标c的新手，我在推动UIImageview的同时尝试设置viewcontroller的图像我检查了其他答案，我按照他们说的方式做了同样的事情，但下面对我不起作用的是我的代码，我将在其中解释其他内容

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{

    DetailViewController *svController = [[DetailViewController alloc] initWithNibName:@"DetailViewController" bundle:[NSBundle mainBundle]];



    UIImage *image = [UIImage imageNamed:@"default.png"];
    UIImageView* imageview = [[UIImageView alloc] initWithImage:image];


    id obj = [[mainArray valueForKey:@"image"] objectAtIndex:[indexPath row]];
    if ([obj isKindOfClass:[NSString class]])
    {




          NSLog(@" image%@",image); //print this image<UIImage: 0xaa70700>

         NSLog(@" image%@",svController.image); //print this  image(null)
        [[svController image] setImage: image];

         NSLog(@" image%@",svController.image);   //print this  image(null)


    }


    else     {
         NSLog(@" image%@",svController.image);

                  [[svController image] setImage: [[mainArray valueForKey:@"image"] objectAtIndex:[indexPath row]]];

              NSLog(@" image%@",svController.image);


    }


    [self.navigationController pushViewController:svController animated:YES];

    [svController release];
    svController = nil;

}

下面是我的detailviewcontroller

@interface DetailViewController : UIViewController{

    UIImageView *image;


}

@property (retain, nonatomic) IBOutlet UIImageView *image;

它连接到Xib并且我合成了它

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


    name.text = nameString;
    email.text = emailString;

     NSLog(@"%@",image); // print this <UIImageView: 0x9d73950; frame = (27 35; 204 181); autoresize = W+H; userInteractionEnabled = NO; layer = <CALayer: 0x9db4050>>

}

当我发送NSString并将它们放在我的标签上而不是为图像工作时，它的工作非常完美它是如此小的东西，但现在我不知道该怎么办请帮助

Answer 1

您无法执行此操作，因为在您尝试设置其图像视图的图像时尚未加载svController的视图（因此图像视图将为null）。

您需要将图像本身传递给您在svController中创建的属性，并在svController的viewDidLoad方法中设置图像。

Answer 2

听到的是简单的方法，我正在展示你可以在详细视图控制器中设置图像的例子

主视图控制器中的

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
 {
    if(indexPath.row == 0)//for 1st row
    {
       DetailViewController *detController = [[DetailViewController alloc]initWithNibName:@"DetailViewController" bundle:nil];
       detController.detailImage = [UIImage imageNamed:@"abc.png"];//setting the property for image
       [self.navigationController pushViewController:detController animated:YES];
       [detController release];//im doing without ARC
    }
    else if (indexPath.row == 1)
    {
       DetailViewController *detController = [[DetailViewController alloc]initWithNibName:@"DetailViewController" bundle:nil];
       detController.detailImage = [UIImage imageNamed:@"123.png"];
       [self.navigationController pushViewController:detController animated:YES];
       [detController release];//im doing without ARC
    }
}

并在您的详细视图控制器中

// .h file
@interface DetailViewController : UIViewController
{

}
@property (retain, nonatomic) IBOutlet UIImageView *ImageView;
@property (nonatomic, retain)UIImage * detailImage;//set a property for image that u are passing from master viewcontroller 
@end

//in .m file

@implementation DetailViewController
@synthesize detailImage;  //synthesise it

// and in viewDidload method 
- (void)viewDidLoad
{
   [super viewDidLoad];

  //set your passed image to image view
  self.ImageView.image = self.detailImage;   
}

Better就是这样做的：

[self.navigationController pushViewController:svController animated:YES];
if(yourImage) //got UIImage reference then only set it
   svController.yourImgView.image = yourImageHere

.................
<<Another code here>>
..............

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Answer 3

设置UI object intialization pushing view controller。

[self.navigationController pushViewController:svController animated:YES];
//set image here

原因是viewDidLoad的{{1}}不会是svController而called还有loaded还没有imageview。

编辑： reference就是这样做的：

Better

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推动视图控制器时不能保持uiimageview的setimage

3 个答案: