Question

我有五个按钮。每个按钮动作。我有一个打开的图库并选择一个图像。但是问题出现在每个按钮动作相同的路径上。

UIImage* image = [info valueForKey:@"UIImagePickerControllerOriginalImage"];

NSData* imageData = UIImagePNGRepresentation(image);

NSString * imageName = @"Myimage.png";


NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

NSString* documentsDirectory = [paths objectAtIndex:0];

NSString* fullPathToFile = [documentsDirectory stringByAppendingPathComponent:imageName];
 NSLog(@"fullPathToFile=%@",fullPathToFile);    //important line

[imageData writeToFile:fullPathToFile atomically:NO];

Answer 1

最初设置全局变量int countVal = 1;

NSString * imageName = [NSString stringWithformat:@"%d.png",countVal]; // Imgae_name set here
NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString* documentsDirectory = [paths objectAtIndex:0];
NSString* fullPathToFile = [documentsDirectory stringByAppendingPathComponent:imageName];
 NSLog(@"fullPathToFile=%@",fullPathToFile);    //important line
[imageData writeToFile:fullPathToFile atomically:NO];
count +=1; // Increment count here

希望此代码对您有所帮助

Answer 2

我可能会遗漏一些东西，但看起来你每次都使用相同的名称：Myimage.png。每次将图像保存在具有相同名称的文档目录中。也许为每个按钮添加一个标签，并使用它来区分5个不同的图像？

Answer 3

尝试使用下面编辑的代码来回答问题仅在于保存图像名称，尝试使用不同的名称保存它以下代码将帮助您使用不同的名称保存图像注意：将标记值放入不同的按钮（5个按钮）并在其目标

中调用bello方法

  -(void)saveImage:(UIButton*)sender{
  UIImage* image = [info valueForKey:@"UIImagePickerControllerOriginalImage"];

NSData* imageData = UIImagePNGRepresentation(image);

NSString * imageName =[NSString stringWithFormat:@"Myimage%d.png",sender.tag];


NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

NSString* documentsDirectory = [paths objectAtIndex:0];

NSString* fullPathToFile = [documentsDirectory stringByAppendingPathComponent:imageName];
NSLog(@"fullPathToFile=%@",fullPathToFile);    //important line

[imageData writeToFile:fullPathToFile atomically:NO];

}

通过这个你可以保存不同名称的图像

Answer 4

可能对你有帮助

[picker dismissModalViewControllerAnimated:YES];
imageView.image= [info objectForKey:@"UIImagePickerControllerOriginalImage"];
NSData *webData = UIImagePNGRepresentation(imageView.image);
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *localFilePath = [documentsDirectory stringByAppendingPathComponent:png];
[webData writeToFile:localFilePath atomically:YES];
NSLog(@"localFilePath.%@",localFilePath);

UIImage *image = [UIImage imageWithContentsOfFile:localFilePath];

OR

使用此代码

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *savedImagePath = [documentsDirectory stringByAppendingPathComponent:@"savedImage.png"];

imageView.image= [info objectForKey:@"UIImagePickerControllerOriginalImage"];
NSData *webData = UIImagePNGRepresentation(imageView.image);
[imageData writeToFile:savedImagePath atomically:NO];  

 NSLog(@"localFilePath.%@",localFilePath);

如果您仍然将其清空，请尝试检查NSData是否已正确创建

NSLog(@"webData.%@",webData);

OR

试试这个：我希望它会对你有所帮助

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
  {
   UIImage *img = [info objectForKey:UIImagePickerControllerEditedImage];
  //you can use UIImagePickerControllerOriginalImage for the original image

  //Now, save the image to your apps temp folder, 

    NSString *path = [NSTemporaryDirectory() stringByAppendingPathComponent:@"upload-image.tmp"];
    NSData *imageData = UIImagePNGRepresentation(img);
   //you can also use UIImageJPEGRepresentation(img,1); for jpegs
   [imageData writeToFile:path atomically:YES];

   //now call your method
  [self uploadMyImageToTheWebFromPath:path];
}

如何从iPhone中的图库中选择图像的路径？

4 个答案: