ios – 更新：图像被捕获但不会显示

概述参见英文答案 > iOS 8 Snapshotting a view that has not been rendered results in an empty snapshot                                    20个 我有一些代码正在处理我的某个应用程序;所以我复制了代码,进行了必要的更改(即textField名称等),除非我将其移动到UIImageVie 参见英文答案 > iOS 8 Snapshotting a view that has not been rendered results in an empty snapshot                                    20个
我有一些代码正在处理我的某个应用程序;所以我复制了代码,进行了必要的更改(即textFIEld名称等),除非我将其移动到UIImageVIEw,否则它会起作用;没有出现.这是我的代码：

vIEwController.h(为简洁起见,仅显示相关部分)

#import "AppDelegate.h"#import "Books.h"#import <AVFoundation/AVFoundation.h>#import "MBProgressHUD.h"#import <MobileCoreServices/MobileCoreServices.h>#import <UIKit/UIKit.h>@class Books;@interface DetailVIEwController : UIVIEwController <UITextFIEldDelegate,UIPopoverControllerDelegate,UIPickerVIEwDataSource,UIPickerVIEwDelegate,UIActionSheetDelegate,uiscrollviewdelegate,UIImagePickerControllerDelegate,AVCaptureMetadataOutputObjectsDelegate>  {}//  UIVIEw@property (strong,nonatomic) IBOutlet UIVIEw *bookDetailVIEw;//  camera stuff@property (strong,nonatomic) IBOutlet UIImageVIEw *oBookImage;- (IBAction)bOpenCamera:(UIbutton *)sender;

这是相关的vIEwController.m代码：

#pragma mark -  Camera stuff- (IBAction)bOpenCamera:(UIbutton *)sender {if ([UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeCamera])  {    UIImagePickerController *imagePicker = [UIImagePickerController new];    imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;    imagePicker.mediaTypes = [NSArray arrayWithObjects: (Nsstring *) kUTTypeImage,nil];    imagePicker.allowsEditing = YES;  //  MUST HAVE!    [imagePicker setDelegate: (ID)self];    [self presentVIEwController:imagePicker animated:YES completion:nil];}}-(voID)image:(UIImage *)image finishedSavingWithError:(NSError *)error contextInfo:(voID *)contextInfo  {if (error) {    CommonMethods *cm = [CommonMethods new];    [cm displayAlert:@"Warning!" andData:@"Failed to save book image..." andTag:0 andVIEwController:self];}}-(voID)imagePickerController:(UIImagePickerController *)picker dIDFinishPickingMediawithInfo:(NSDictionary *)info  {self.oBookImage.contentMode = UIVIEwContentModeScaleAspectFill;Nsstring *mediaType = [info objectForKey:UIImagePickerControllerMediaType];[self dismissVIEwControllerAnimated:NO completion:nil];if ([mediaType isEqualToString:(Nsstring *)kUTTypeImage]) {  //  (abstract image data)    UIImage *image =  [info objectForKey:UIImagePickerControllerOriginalimage];    //  resize it...    CGRect screenRect = CGRectMake(0,114.0,128.0);  //  was 90.0,120.0    UIGraphicsBeginImageContext(screenRect.size);    [image drawInRect:screenRect blendMode:kCGBlendModePlusDarker Alpha:1];    UIImage *newImage = UIGraphicsGetimageFromCurrentimageContext();    UIGraphicsEndImageContext();    oBookImage.image = newImage;  //  show it...}}-(voID)imagePickerControllerDIDCancel:(UIImagePickerController *)picker  {[self dismissVIEwControllerAnimated:NO completion:nil];}

更新：在捕获图像时的某个时刻,我收到此警告：

Snapshotting a vIEw that has not been rendered results in an empty snapshot. Ensure your vIEw has been rendered at least once before snapshotting or snapshot after screen updates.

也许这与它有关？我试图纠正警告,无济于事.

我在Google和SO中寻找过类似的问题,但一无所获.我已经为此工作了两天,并决定是时候寻求帮助了.提前致谢.

SD

解决方法 我也得到了这个问题.经过几个小时的研究,我遇到了这个： iOS8 Snapshotting a view that has not been rendered results in an empty snapshot

也许最后的答案可以帮到你？希望如此.如果没有,那么它可能只是一个错误.

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