升级IOS10 或是XCODE8 之后QLPreviewController无法读取文件内容

Question

IOS10以下都是正常显示,升级到10以后就是一片空白了,求助大神怎么回事啊?下了XCODE8调试,发现不进代理方法,用了reloadData虽然进代理方法了,但是仍不显示,求助!!!

Answer 1

 QLPreviewController* previewer = [[QLPreviewController alloc] init];    previewer.dataSource = self;
    previewer.delegate = self;
    // To avoid iOS 10 previewer issue.
    if (SYSTEM_VERSION_LESS_THAN(@"10.0")) {
        [self addChildViewController:previewer];
    }
    CGFloat width = self.view.frame.size.width;
    CGFloat height = self.view.frame.size.height;
    previewer.view.frame = CGRectMake(0, 102, width, height-300);
    [self.view addSubview:previewer.view];    [previewer didMoveToParentViewController:self];

Answer 2

 _previewController = [[QLPreviewController alloc] init];
        _previewController.dataSource = self;
        _previewController.delegate   = self;
        _previewController.view.frame = CGRectMake(0,0, App_Frame_Width, APP_Frame_Height);
//        _previewController.currentPreviewItemIndex = 0;
        self.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
        
        ICLog(@"%@",[ICTools getSystemVersion]);
        // To avoid iOS 10 previewer issue.
        if ([ICTools getSystemVersion].doubleValue >= 10.0) {
            [self addChildViewController:_previewController];
        }
        
//        [_previewController reloadData];
        [self.view addSubview:_previewController.view];
        [_previewController didMoveToParentViewController:self];