放大/缩小加载在UIWebView中的pdf

Question

我已经从资源包中加载了一个PDF文件在UIWebView中。

现在，我无法放大/缩小PDF文件。

我发现下面的2相关的链接，但没有答案被标记为正确的 -

1. How to zoom webView with pdf file

2. Enable zooming/pinch on UIWebView

如何使PDF缩放/ pinchable已经从资源包中加载到UIWebView中，下面的解决方案可以工作吗？

1. Problem with pdf while opening in UIWebView

感谢您的帮助。

Answer 1

在你的WebView上Interface Builder的附加检查，以缩放页面以适合并启用一个捏ZoomIn缩小（ZoomOut）;）

或者，如果你想小伙子好您的PDF尝试看看下面的代码：

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 

    [webView loadRequest:[NSURLRequest requestWithURL:@"http:pdfURL"]]; 

    NSString *path = [[NSBundle mainBundle] pathForResource:@"yourPDFFile" ofType:@"pdf"]; 
    NSURL *url = [NSURL fileURLWithPath:path]; 
    NSURLRequest * request = [NSURLRequest requestWithURL:url]; 
    [webView loadRequest:request]; 
    //--------------AND HERE USE SCALE PAGE TO FIT------------------// 
    [webView setScalesPageToFit:YES]; 

} 

希望这对你有所帮助。

Answer 2

//尝试这样

NSString *urlstr=@"www.example.com/yy.pdf"; 
web=nil; 
web=[[UIWebView alloc] initWithFrame:CGRectMake(0, 98, 320, 367)]; 
web.delegate=self; 
[self.view addSubview:web]; 
[web loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:urlstr]]]; 
UIPinchGestureRecognizer *pgr = [[UIPinchGestureRecognizer alloc] 
           initWithTarget:self action:@selector(handlePinch:)]; 
pgr.delegate = self; 
[web addGestureRecognizer:pgr]; 

//目标操作

- (IBAction)handlePinch:(UIPinchGestureRecognizer *)recognizer 
{ 
    recognizer.view.transform = CGAffineTransformScale(recognizer.view.transform, recognizer.scale, recognizer.scale); 
recognizer.scale = 1; 
    } 

在此之前在.H添加UIGestureRecognizerDelegate。希望它可以帮助你..

Answer 3

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

NSString *documentsDirectory = [paths objectAtIndex:0]; 

NSFileManager *fileManager = [NSFileManager defaultManager]; 

if ([fileManager fileExistsAtPath:documentsDirectory]) 
{ 
    NSURL *url = [NSURL fileURLWithPath:strFileName]; 
    NSURLRequest *request = [NSURLRequest requestWithURL:url]; 
    [webView setScalesPageToFit:YES]; 
    [webview loadRequest:request]; 
}