我试图用UIDocumentInteractionController预览文档.
该文件是我的应用程序从网络下载的.xls文件.我不断得到这个错误：
该文件是我的应用程序从网络下载的.xls文件.我不断得到这个错误：
'UIDocumentInteractionController: invalid scheme (null). Only the file scheme is supported.'
我使用下面的代码：
- (void) webServiceController:(WebServiceController *)webServiceController returnedArray:(NSMutableArray *)array {
if ([webServiceController.webRequest isEqualToString: @"generateExcelFileForEmployee"]) {
// start previewing the document at the current section index
Nsstring *link = [[Nsstring stringWithString:array[0]] stringByReplacingOccurrencesOfString:@"AdminFunctions.PHP" withString:@"AdminFunctions.xls"];
link = [[[link stringByReplacingOccurrencesOfString:@"\\" withString:@""]stringByReplacingOccurrencesOfString:@"/public/sites/" withString:@"http://"]stringByReplacingOccurrencesOfString:@"\"\\\"" withString:@""];
NSLog(@"%@",link);
NSData *urlData = [NSData dataWithContentsOfURL:[NSURL URLWithString:link]];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);
Nsstring *documentsDirectory = [paths objectAtIndex:0];
Nsstring *filePath = [Nsstring stringWithFormat:@"%@/%@",documentsDirectory,@"AdminFunctions.xls"];
BOOL isWriteSuccess = [urlData writetoFile:filePath atomically:YES];
NSLog(@"%@",filePath);
if(isWriteSuccess) //success
{
file = [NSURL fileURLWithPath:filePath];
self.fileView = [self setupControllerWithURL:file usingDelegate:self];
[self.fileView presentPreviewAnimated:YES];
}
else
{
NSLog(@"file not written");
}
}
}
- (UIDocumentInteractionController *) setupControllerWithURL: (NSURL*) fileURL usingDelegate: (id <UIDocumentInteractionControllerDelegate>) interactionDelegate {
UIDocumentInteractionController *interactionController =
[UIDocumentInteractionController interactionControllerWithURL: fileURL];
interactionController.delegate = interactionDelegate;
return interactionController;
}
- (UIViewController *) documentInteractionControllerViewControllerForPreview: (UIDocumentInteractionController *) controller {
return self;
}
这两种方法都在我想呈现预览的viewcontroller中实现.我知道很难,我得到的数据在urlData对象,因为当我放入断点,控制台说,它包含6144字节,这正是要下载的文件的大小.
我一直在寻找这个安静的一段时间,但我似乎无法弄清楚如何解决这个问题.我已经尝试将link对象作为documentInteractionController的源,但是错误更改为：
'UIDocumentInteractionController: invalid scheme (http). Only the file scheme is supported.'
任何关于如何克服这个问题的意见将被高度赞赏
解决方法
尝试使用
file = [NSURL fileURLWithPath:filePath];
代替
file = [NSURL URLWithString:filePath];