应该重复使用相机崩溃的应用程序?
问题描述:
我有一个应用程序,从用户图像构建幻灯片。他们可以从他们的图书馆中抓取图片或拍照。我发现重复使用从图书馆抓取图像是很好的。但重复使用拍摄照片会导致不稳定的行为。我一直在崩溃,但大部分情况似乎是在“didFinishPickingMediaWithInfo”之后重新加载视图,这会导致混乱。应该重复使用相机崩溃的应用程序?
我没有泄漏,它似乎是在每张照片拍摄后正确释放。我正在调整图像大小并将其保存在数据库中。有没有人遇到这种情况?相机是不是被设计为经常被调用?
答
对不起。它不是连续的,它是拍摄照片,取出并释放相机,然后用户选择A,B或C选项(它们会在整个过程中提示选择许多东西),然后他们可以拍摄另一张照片,取出并释放相机。 ..等等......这些事情发生了几次,他们完成了所有的数据输入。
他们选择相机后,我称之为代码。我没有在dealloc方法中释放图像选择器。
- (void)openCamera {
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
{
imagePicker = [[UIImagePickerController alloc] init];
imagePicker.delegate = self;
imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
[self presentModalViewController:imagePicker animated:YES];
[imagePicker release];
}
}
从相机我叫下面的代码,他们“用”拍摄的照片后。它基于图像的原始大小调整图像大小。
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
UIImage *tempCameraImage = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
[picker dismissModalViewControllerAnimated:YES];
CGFloat originalSize = tempCameraImage.size.width * tempCameraImage.size.height;
NSLog(@"Original Size %f", originalSize);
if (originalSize > 2500000.0) {
CGSize size = tempCameraImage.size;
CGRect rect = CGRectMake(0.0, 0.0, .23 * size.width, .23 * size.height);
UIGraphicsBeginImageContext(rect.size);
[tempCameraImage drawInRect:rect];
theImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
CGFloat totalSize = theImage.size.width * theImage.size.height;
NSLog(@"Final Camera Size %f", totalSize);
[self resizeImageCamera];
return;
}
else {
CGSize size = tempCameraImage.size;
CGRect rect = CGRectMake(0.0, 0.0, .27 * size.width, .27 * size.height);
UIGraphicsBeginImageContext(rect.size);
[tempCameraImage drawInRect:rect];
theImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
CGFloat totalSize = theImage.size.width * theImage.size.height;
NSLog(@"Final Camera Size %f", totalSize);
[self resizeImageCamera];
return;
}
}
-(void)resizeImageCamera {
if (editingImage1) {
NSManagedObject *image = [NSEntityDescription insertNewObjectForEntityForName:@"Image" inManagedObjectContext:slideshow.managedObjectContext];
slideshow.image = image;
[image setValue:theImage forKey:@"image"];
CGSize size = theImage.size;
CGRect rect = CGRectMake(0.0, 0.0, .15 * size.width, .15 * size.height);
UIGraphicsBeginImageContext(rect.size);
[theImage drawInRect:rect];
slideshow.thumbnailImage1 = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
[self finishCameraImage];
return;
}
}
-(void)finishCameraImage {
if (editingImage1) {
keyInt = @"2";
[editedObject setValue:keyInt forKey:@"script1"];
pictureView.alpha = 0;
self.navigationItem.rightBarButtonItem = nil;
editedFieldKey = @"line2Int";
editedFieldName = NSLocalizedString(@"line2Int", @"display name for line2");
self.title = editedFieldName;
linePicker.hidden = NO;
}
我知道我做了很多这样的形象。如果我投入几次延迟会有帮助吗?
你肯定有什么错,仅仅是因为你可以在正常使用相机时几乎无限期地继续拍照。除非在SDK中有一些错误的行为,但我敢肯定,没有什么是严重的 - 至少如果您在Google上找不到任何信息。 – 2010-06-14 20:27:18
发布您的代码我们可能会帮助 – Daniel 2010-06-14 20:28:03
谢谢,代码刚刚发布 – Sam 2010-06-14 21:19:32