Ios7 如何在iOS 7中通过提供图像名称从照片库中获取图像

我想从iPhone模拟器中的照片库中获取图像，只需给出图像名称或完整路径。但我不知道该怎么做。请带我离开这里。

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提前谢谢。

要访问库目录，您需要使用NSLibraryDirectory而不是NSDocumentDirectory，然后使用以下代码。我想这可能对你有用

NSString* fileName = [NSString stringWithFormat:@"%@.png",patientlastName];
NSArray *arrayPaths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory,NSUserDomainMask, YES); 
NSString *path = [arrayPaths objectAtIndex:0];
NSString* pdfFileName = [path stringByAppendingPathComponent:fileName];
UIImage *image1=[UIImage imageWithContentsOfFile:pdfFileName];
imageView.image=image1;

如果您想打开照片库并从中获取图像，则必须使用UIImagePickerController并实现其委托方法，如下所示

在.m文件中类的@implementation上面，使用以下代码

#pragma mark - NON Rotation
@interface NonRotatingUIImagePickerController : UIImagePickerController

@end

@implementation NonRotatingUIImagePickerController

- (BOOL)shouldAutorotate
{
    return NO;
}

@end

然后在实现class.m文件时使用下面的代码

-(void)openPhotoLibrary {

    if ([UIImagePickerController isSourceTypeAvailable:
                         UIImagePickerControllerSourceTypeSavedPhotosAlbum])
                    {
                        UIImagePickerController *imagePicker =
                        [[NonRotatingUIImagePickerController alloc] init];
                        imagePicker.delegate = self;
                        imagePicker.sourceType =
                        UIImagePickerControllerSourceTypePhotoLibrary;
                        imagePicker.mediaTypes = [NSArray arrayWithObjects:
                                                  (NSString *) kUTTypeImage,
                                                  nil];
                        imagePicker.allowsEditing = NO;
    }
}

UIImagePickerController代理

#pragma mark - ImagePicker Controller Delegate
-(void)imagePickerController:(UIImagePickerController *)picker
didFinishPickingMediaWithInfo:(NSDictionary *)info
{
 NSString *mediaType = [info
                           objectForKey:UIImagePickerControllerMediaType];
    [self dismissViewControllerAnimated:YES completion:nil];
    if ([mediaType isEqualToString:(NSString *)kUTTypeImage]) {
UIImage *image = [info
                          objectForKey:UIImagePickerControllerOriginalImage];

        imageView.image = image;
}
}

-(void)image:(UIImage *)image
finishedSavingWithError:(NSError *)error
 contextInfo:(void *)contextInfo
{
    if (error) {
//Right some error related code...
}
}

-(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
    [self dismissViewControllerAnimated:YES completion:nil];
}

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我认为这会对您有所帮助。

您是否需要在不打开照片库的情况下从照片库获取图像？或者您需要通过拾取照片库中的图像来获取照片库中的图像。照片库将被打开？如果您要从照片库中打开图像，则必须使用uiimagepicker控制器并实现其委派方法。要访问照片库，您必须使用以下方法。NSArray*Path=NSSearchPathForDirectoriesInDomains（NSLibraryDirectory，NSUserDomainMask，是）；NSString*libPath=[path objectAtIndex:0]；

NSString* fileName = [NSString stringWithFormat:@"%@.png",patientlastName];
NSArray *arrayPaths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory,NSUserDomainMask, YES); 
NSString *path = [arrayPaths objectAtIndex:0];
NSString* pdfFileName = [path stringByAppendingPathComponent:fileName];
UIImage *image1=[UIImage imageWithContentsOfFile:pdfFileName];
imageView.image=image1;