我是 iPhone 应用程序开发的新手。在我的代码中,我能够从库中选择多张图片并获得只有一张图片的路径。然后我在名为“图像”的文件夹中的文档目录中创建该图像的副本并尝试压缩它。现在我想获取所有这些选定的多个图像的路径,将它们复制到同一文件夹“图像”中的文档目录中,我想稍后将它们压缩。 请告诉我如何在我的代码中完成上述任务。 这是我的代码现在的样子:
- (void) imagePickerController:(QBImagePickerController *)imagePickerController didFinishPickingMediaWithInfo:(NSDictionary *)info
{
if (imagePickerController.allowsMultipleSelection) {
NSArray *mediaInfoArray = (NSArray *)info;
NSLog(@"Selected %d photos", mediaInfoArray.count);
NSData *webData = UIImagePNGRepresentation([[mediaInfoArray objectAtIndex:0] objectForKey:@"UIImagePickerControllerOriginalImage"]);
NSLog(@"web data length is: %u",[webData length]);
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *localFilePath = [documentsDirectory stringByAppendingString:@"/images.png"];
[webData writeToFile:localFilePath atomically:YES];
NSLog(@"localFilePath.%@",localFilePath);
}
最佳答案
我使用了相同的 QBImagePickerController 并使用下面的方法在 NSMutableArray 中添加了多个图像。请检查,一旦将它们添加到数组中,您就可以将它们添加到任何需要的地方。
- (void)imagePickerController:(QBImagePickerController *)imagePickerController didFinishPickingMediaWithInfo:(id)info
{
if(imagePickerController.allowsMultipleSelection)
{
NSArray *mediaInfoArray = (NSArray *)info;
for (int i =0; i<mediaInfoArray.count ; i++)
{
NSString *stringPath = [[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)objectAtIndex:0]stringByAppendingPathComponent:@"/Folder/Selected Files"];
dispatch_async(dispatch_get_main_queue(), ^{
NSData *data = UIImageJPEGRepresentation([[mediaInfoArray valueForKey:@"UIImagePickerControllerOriginalImage"] objectAtIndex:i], 1.0);
NSString *fileName = [stringPath stringByAppendingPathComponent:[NSString stringWithFormat:@"Image%d.png",i]];
[data writeToFile:fileName atomically:YES];
});
[ImagesArray addObject:[[mediaInfoArray valueForKey:@"UIImagePickerControllerOriginalImage"] objectAtIndex:i]];
}
}
else
{
//NSDictionary *mediaInfo = (NSDictionary *)info;
//NSLog(@"Selected: %@", mediaInfo);
}
}
[TableView reloadData];
[self dismissViewControllerAnimated:YES completion:NULL];
}
希望这有助于...
编辑:
好吧,我给了你一个更好的解决方案,因为在缓存目录中保存总是比在文档目录中保存更好,请查看 is saving in NSDocumentDirectory okay?
但是如果你想把它保存在文档目录中,那么你可以简单地替换
NSString *stringPath = [[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)objectAtIndex:0]stringByAppendingPathComponent:@"/Folder/Selected Files"];
与
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *savedImagePath = [documentsDirectory stringByAppendingPathComponent:@"savedImage.png"];
关于iphone - 如何获取从 iPhone 库中选择的多张图片的路径?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/18327293/