iphone - 从我的图库添加照片时出错？

Question

我在下面发布的代码有两个功能；第一个是拍照(工作正常)，第二个是从库中挑选图像(不起作用)。这些函数没有被正确调用。请检查我的代码并让我知道出了什么问题。

提前致谢。

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
    NSString *mediaType = [info objectForKey:UIImagePickerControllerMediaType];
    static NSDateFormatter *dateFormatter = nil;
    NSString *stringDate = nil;
    if (dateFormatter == nil) {
        dateFormatter = [[NSDateFormatter alloc] init];
        [dateFormatter setDateFormat:@"EE, d LLLL yyyy"];
        stringDate = [dateFormatter stringFromDate:[NSDate date]];
    }
    if ([mediaType isEqualToString:(NSString *)kUTTypeImage]) {
        UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
        // storing to camera roll
        UIImageWriteToSavedPhotosAlbum(image,self,@selector(image:finishedSavingWithError:contextInfo:),nil);
        CGSize newSize=CGSizeMake(320, 436);
        UIGraphicsBeginImageContext(newSize);
        [image drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];
        UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();

        xapp.profileImage=newImage;
        [[NSNotificationCenter defaultCenter]postNotificationName:@"addImage" object:nil];
    }

    // Commit the change.
    [self dismissModalViewControllerAnimated:YES];
}

-(void)image:(UIImage *)image finishedSavingWithError:(NSError *)error contextInfo:(void *)contextInfo {
    if (error) {
        UIAlertView *alert = [[UIAlertView alloc]
                          initWithTitle: @"Save failed"
                          message: @"Failed to save image"
                          delegate: nil
                          cancelButtonTitle:@"OK"
                          otherButtonTitles:nil];
        [alert show];
    }
}

Answer 1

嗨，我刚刚放置了从照片库的相机完全捕获图像的代码，只需检查一下并尝试在您的项目中实现:-

-(IBAction)actionImage:(id)sender
{   
    UIActionSheet *option =[[UIActionSheet alloc]initWithTitle:@"Select" delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:nil otherButtonTitles:@"Select Photo",@"Take Photo",nil];
    option.actionSheetStyle =UIActionSheetStyleDefault;
    [option showInView:self.view];
}

-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
    if (actionSheet.tag==2) 
    {
        [self.navigationController popViewControllerAnimated:YES];
    }
    else
    {

        UIImagePickerController * picker = [[UIImagePickerController alloc] init];
        picker.delegate = self;

        if(buttonIndex ==0)
        {
            if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary])
            {       
                picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
                [self presentModalViewController:picker animated:YES];      
            }
        }
        else if(buttonIndex ==1)
        {
            if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
            {       
                picker.sourceType = UIImagePickerControllerSourceTypeCamera;
                [self presentModalViewController:picker animated:YES];      
            }
        }   
    }
}
#pragma mark - imagePickerController Delegate
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    [self dismissModalViewControllerAnimated:YES];
    imgUserImage.image = [info valueForKey:@"UIImagePickerControllerOriginalImage"];    

    return;
}

注意:-不要忘记包含相关的框架或委托(delegate)。希望它能帮助您不需要额外的编码，您只需使用上述方法即可完成:)