使用相机单击照片后，iPhone将照片存储在应用程序中

Question

我想通过应用程序使用相机单击照片。然后将照片存储在应用程序中。是否可以？谁能告诉我如何实现这一目标。我还想知道 .EXIF 数据是否会与图像一起保留。请帮忙。

Answer 1

这个概念从应用程序和应用程序中获取屏幕截图。稍后使用它们

1.

    UIGraphicsBeginImageContext(self.view.bounds.size);
    [self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *saveImage = UIGraphicsGetImageFromCurrentImageContext();

    CGContextRef context = UIGraphicsGetCurrentContext();
    UIImageWriteToSavedPhotosAlbum(saveImage, self, @selector(image:didFinishSavingWithError:contextInfo:), &context);
    UIGraphicsEndImageContext();


    NSData *imageData = UIImagePNGRepresentation(saveImage);
    NSString *imageName = @"temp.png";

    NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString* documentsDirectory = [paths objectAtIndex:0];

    NSString* fullPathToFile = [documentsDirectory stringByAppendingPathComponent:imageName];
    [imageData writeToFile:fullPathToFile atomically:NO];

Above code takes screenshot of the view & save this image in the documentsDirectory as "temp.png"

2.

    NSInteger primaryKeyValue = 1;
    NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString* documentsDirectory = [paths objectAtIndex:0];
    NSString* fullPathToFile = [documentsDirectory stringByAppendingPathComponent:@"temp.png"];
    NSString *filePath2 = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat: @"%d.png",primaryKeyValue ]];
    NSFileManager *fileMgr = [NSFileManager defaultManager];
    [fileMgr moveItemAtPath:fullPathToFile toPath:filePath2 error:nil];

3.
稍后，如果您想使用此图像

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
    NSString *uniquePath = [[paths objectAtIndex:0] stringByAppendingPathComponent:[NSString stringWithFormat: @"%d.png",primaryKeyValue ]]; 
    UIImage *image = [UIImage imageWithContentsOfFile:uniquePath];