在另一个视图控制器中传递 ImagePickerView 的图像
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【中文标题】在另一个视图控制器中传递 ImagePickerView 的图像【英文标题】:Passing Image of ImagePickerView in another View Controller 【发布时间】:2013-12-06 15:32:07 【问题描述】:大家好,我正在使用 imagePickerView 的视图控制器中的每个人
当用户从库中选择一张照片时,我希望所选照片将显示在另一个视图控制器中。
我目前正在使用情节提要,所以我正在使用这种方法:
- (void) imagePickerController : ( UIImagePickerController *) picker didFinishPickingMediaWithInfo : ( NSDictionary *) info
UIImage * PhotoForEdit = self.FF_image ;
PhotoForEdit = [info objectForKey : UIImagePickerControllerEditedImage ] ;
FFEditingPhotoPost *VCPhotoEdit = [[FFEditingPhotoPost alloc] initWithImage:PhotoForEdit];
[self performSegueWithIdentifier:@"immagine"sender:self];
[self.navigationController pushViewController:VCPhotoEdit animated:NO];
[self dismissViewControllerAnimated:YES completion:nil];
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
FFEditingPhotoPost * controller = (FFEditingPhotoPost *)segue.destinationViewController;
controller.FFOriginalImage = FF_image;
我的问题是我不能使用在视图 CONTROLLR 中选择的情节提要图像接下来...我在哪里做错了?
谢谢大家的建议
编辑:插入应该显示照片的视图控制器
#import "FFEditingPhotoPost.h"
#import "UIImage+Resize.h"
@interface FFEditingPhotoPost ()
@end
@implementation FFEditingPhotoPost
@synthesize FFScrollView;
@synthesize FFImageView;
@synthesize FFOriginalImage;
@synthesize SelectedFoto;
@synthesize SelectedFotoMiniature;
- (id)initWithImage:(UIImage *)image
self = [super initWithNibName:nil bundle:nil];
if (self)
if (!image)
return nil;
FFOriginalImage = image;
// self.fileUploadBackgroundTaskId = UIBackgroundTaskInvalid;
// self.photoPostBackgroundTaskId = UIBackgroundTaskInvalid;
return self;
- (void)viewDidLoad
[super viewDidLoad];
FFScrollView = [[UIScrollView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];
FFScrollView.delegate = self;
FFScrollView.backgroundColor = [UIColor blackColor];
// self.view = FFScrollView;
FFImageView = [[UIImageView alloc] initWithFrame:CGRectMake(20.0f, 42.0f, 280.0f, 280.0f)];
[FFImageView setBackgroundColor:[UIColor blackColor]];
[FFImageView setImage:FFOriginalImage];
[FFImageView setContentMode:UIViewContentModeScaleAspectFit];
FFImageView.layer.masksToBounds = NO;
FFImageView.layer.shadowRadius = 3.0f;
FFImageView.layer.shadowOffset = CGSizeMake(0.0f, 2.0f);
FFImageView.layer.shadowOpacity = 0.5f;
FFImageView.layer.shouldRasterize = YES;
[FFScrollView setContentSize:CGSizeMake(FFScrollView.bounds.size.width, FFImageView.frame.origin.y + FFImageView.frame.size.height + FFImageView.frame.size.height)];
[self shouldUploadImage:FFOriginalImage];
- (BOOL)shouldUploadImage:(UIImage *)anImage
UIImage *resizedImage = [anImage resizedImageWithContentMode:UIViewContentModeScaleAspectFit bounds:CGSizeMake(560.0f, 560.0f) interpolationQuality:kCGInterpolationHigh];
UIImage *thumbnailImage = [anImage thumbnailImage:86.0f transparentBorder:0.0f cornerRadius:10.0f interpolationQuality:kCGInterpolationDefault];
// JPEG to decrease file size and enable faster uploads & downloads
NSData *imageData = UIImageJPEGRepresentation(resizedImage, 0.8f);
NSData *thumbnailImageData = UIImagePNGRepresentation(thumbnailImage);
if (!imageData || !thumbnailImageData)
return NO;
SelectedFoto = [PFFile fileWithData:imageData];
SelectedFotoMiniature = [PFFile fileWithData:thumbnailImageData];
[SelectedFoto saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error)
if (succeeded)
NSLog(@"Photo uploaded successfully");
[SelectedFotoMiniature saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error)
if (succeeded)
NSLog(@"Thumbnail uploaded successfully");
];
else
];
return YES;
【问题讨论】:
为什么在推视图控制器的同时执行segue操作? 【参考方案1】:我认为 PhotoForEdit = [info objectForKey : UIImagePickerControllerEditedImage ] ;应该是 self.FF_image =
编辑-----
您的代码有几处问题。首先,您正在创建 FFEditingPhotoPost
视图控制器的 2 个副本。谁知道哪一个实际上最终排名第一。
如果您设置了故事板转场,则更改您的图像选择器代码以执行转场,如下所示:
- (void) imagePickerController : ( UIImagePickerController *) picker didFinishPickingMediaWithInfo : ( NSDictionary *) info
self.FF_image = [info objectForKey : UIImagePickerControllerEditedImage ] ;
[self performSegueWithIdentifier:@"immagine"sender:self];
您的prepareForSegue
代码很好。请注意,我还切换了设置 self.FF_image 属性的代码,因为这是错误的方法。
现在在您的FFEditingPhotoPost
视图控制器中,您不需要initWithImage
方法,只需使用viewWillAppear
方法来设置您的图像。 viewDidLoad
方法在您的 prepareForSegue
之前调用,这意味着在您尝试使用它时 FFOriginalImage
为 nil。
所以像这样使用viewWillAppear
:
- (void)viewWillAppear:(BOOL)animated
[super viewWillAppear:animated];
[FFImageView setImage:FFOriginalImage];
【讨论】:
你好,达伦,谢谢你的回复......你的建议似乎奏效了,应用程序没有崩溃,一切都很好,但我仍然没有看到图像通过......我不明白为什么...我通过插入应该显示照片的视图控制器来编辑我的帖子 删除你的 segue 代码。您已经在分配 VC 并推送它,因此也不需要 segue。 segue 还创建了一个 VC,所以你最终得到 2以上是关于在另一个视图控制器中传递 ImagePickerView 的图像的主要内容,如果未能解决你的问题,请参考以下文章