将图像从一个视图传递到另一个视图

我正在从照片库中获取用户的图片，我想将其传递给另一个视图…

我读过，我应该可以简单地做这样的事情：

secView.imgView.image = selectedImage.image; 

设置我的UIImageView在第二个视图是从我的UIImageView图像…但在第二个视图中的UIImageView只是空的…

我的代码是这个…

ViewController.h：

 @interface ViewController : UIViewController <UINavigationControllerDelegate, UIImagePickerControllerDelegate> { UIImagePickerController *picker; IBOutlet UIImageView *selectedImage; SecondView *secondView; } @property (nonatomic, retain) UIImageView *selectedImage; @property (nonatomic, retain) SecondView *secondView; -(IBAction)sendImage:(id)sender; -(IBAction)openGallery:(id)sender; @end 

ViewController.m（只有相关的部分）

 -(IBAction)sendImage:(id)sender { if(self.secondView == nil) { SecondView *secView = [[SecondView alloc] initWithNibName:@"SecondView" bundle:[NSBundle mainBundle]]; self.secondView = secView; secView.imgView.image = selectedImage.image; } [self.navigationController pushViewController:secondView animated:YES]; } -(IBAction)openGallery:(id)sender { picker = [[UIImagePickerController alloc] init]; picker.delegate = self; picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; [self presentModalViewController:picker animated:YES]; } -(void)imagePickerControllerDidCancel:(UIImagePickerController *) Picker { [Picker dismissModalViewControllerAnimated:YES]; } - (void)imagePickerController:(UIImagePickerController *) Picker didFinishPickingMediaWithInfo:(NSDictionary *)info { // Save the image selectedImage.image = [info objectForKey:UIImagePickerControllerOriginalImage]; [Picker dismissModalViewControllerAnimated:YES]; } 

在另一篇文章中，我读到另一种方法是这样做的：

 -(IBAction)sendImage:(id)sender { if(self.secondView == nil) { SecondView *secView = [[SecondView alloc] initWithNibName:@"SecondView" bundle:[NSBundle mainBundle]]; self.secondView = secView; [secView setImage:selectedImage.image]; } [self.navigationController pushViewController:secondView animated:YES]; } 

然后在secondview.h中

 -(void)setImage:(UIImage *)image; 

和.m

 -(void)setImage:(UIImage *)image { [imgView setImage:image]; } 

但是这两种方法都会导致一个空的UIImageView …那么这样做的正确方法是什么？

提前致谢！

编辑

SecondView目前相当简单…（在发布的代码中，我尝试并遵循方法二）

 @interface SecondView : UIViewController { UIImageView *imgView; } @property (nonatomic, retain) IBOutlet UIImageView *imgView; -(void)setImage:(UIImage *)image; @end @implementation SecondView @synthesize imgView; -(void)setImage:(UIImage *)image { [imgView setImage:image]; } - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; if (self) { // Custom initialization } return self; } - (void)didReceiveMemoryWarning { // Releases the view if it doesn't have a superview. [super didReceiveMemoryWarning]; // Release any cached data, images, etc that aren't in use. } #pragma mark - View lifecycle - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view from its nib. } - (void)viewDidUnload { [super viewDidUnload]; // Release any retained subviews of the main view. // eg self.myOutlet = nil; } - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { // Return YES for supported orientations return (interfaceOrientation == UIInterfaceOrientationPortrait); } @end 

解决scheme好的…回到第一种方法，并做了一些最终工作的改变…

 -(IBAction)sendImage:(id)sender { if(self.secondView == nil) { SecondView *secView = [[SecondView alloc] initWithNibName:@"SecondView" bundle:[NSBundle mainBundle]]; self.secondView = secView; secView.theImage = selectedImage.image; } [self.navigationController pushViewController:secondView animated:YES]; } 

而在第二个视图中，我创build了UIImage * theImage – 然后我设置了[imgView setImage：theImage]; 在viewDidLoad，哪些工作…

Answer 1

这解决了这个问题：

 -(IBAction)sendImage:(id)sender { if(self.secondView == nil) { SecondView *secView = [[SecondView alloc] initWithNibName:@"SecondView" bundle:[NSBundle mainBundle]]; self.secondView = secView; secView.theImage = selectedImage.image; } [self.navigationController pushViewController:secondView animated:YES]; } 

SecondView：

 @interface SecondView : UIViewController { UIImageView *imgView; UIImage *theImage; } @property (nonatomic, retain) IBOutlet UIImageView *imgView; @property (nonatomic, retain) UIImage *theImage; -(void)setImage:(UIImage *)image; @end 

并在secondView的.m中：

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

Answer 2

我想我发现了这个问题：

在你的类secondView中，你的UIImageView没有连接到nib文件中的对象UIImageView。

你应该有这样的东西：

 IBOutlet UIImageView *imgView; 

要检查视图是否正确连接到笔尖，您可以这样做：

 - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; if (self) { // Custom initialization [imgView setBackgroundColor:[UIColor redColor]]; } return self; } 

你的问题是有趣的，请让我知道，如果它不工作，我会更深入地检查。

Answer 3

//第一个ViewController： – （void）passimage {

  Second_ViewController *select_main =[[UIStoryboard storyboardWithName:@"Main" bundle:nil]instantiateViewControllerWithIdentifier:@"Second_ViewController"]; select_main.tt_image=_bg_imageview.image; [[self navigationController] pushViewController:select_main animated:YES]; 

}

//第二个ViewController传递Uiimage对象：

• （void）viewDidLoad {

  _bg_imageview.image = _bb_image; }