Question

我尝试使用'developer.apple.com'中的ZoomingPDFViewer源代码并显示PDF文件。我的代码的不同之处在于我正在使用Nib文件来添加一些额外的功能。我只是使用源代码中的PDFScrollView和TiledPDFView类文件。当我尝试调用方法[（PDFScrollView *）self.view setPDFPage：PDFPage];我收到以下错误：

Smart_Reader [408：f803] - [UIView setPDFPage：]：无法识别的选择器发送到实例0x6ea09b0 Smart_Reader [408：f803] * * 终止应用程序由于未捕获的异常 *' NSInvalidArgumentException '，原因：' - [UIView setPDFPage：]：无法识别的选择器发送到实例 0x6ea09b0' *第一次调用堆栈：（0x1283022 0x183bcd6 0x1284cbd 0x11e9ed0 0x11e9cb2 0x2a49 0x489e29 0x489133 0x48a3bf 0x48ca21 0x48c97c 0x4853d7 0x1ea1a2 0x1ea532 0x1d0dc4 0x1c4634 0x2176ef5 0x1257195 0x11bbff2 0x11ba8da 0x11b9d84 0x11b9c9b 0x21757d8 0x217588a 0x1c2626 0x1e5d 0x1dc5）终止调用抛出异常

我对objective-c非常新，这是我在stackoverflow.com上的第一篇文章。我将非常感谢这个伟大社区的任何帮助

PDFReader.h

#import <UIKit/UIKit.h>
#import <QuartzCore/QuartzCore.h>

@interface ReaderViewController : UIViewController //<UIScrollViewDelegate>
{
    IBOutlet UILabel *TapLabel;
}



- (void)handleSingleTap:(UITapGestureRecognizer *)recognizer;


@end

PDFReader.m

#import "ReaderViewController.h"
#import <QuartzCore/QuartzCore.h>
#import "TiledPDFView.h"
#import "PDFScrollView.h"
#import "singleton.h"

@interface ReaderViewController ()

@end

@implementation ReaderViewController
{

}



- (void)viewDidLoad
{

    [super viewDidLoad];
    self.view.backgroundColor = [UIColor clearColor];

    NSDictionary *infoDictionary = [[NSBundle mainBundle] infoDictionary];

    NSString *name = [infoDictionary objectForKey:@"NEWGEN KNOWLEDGE WORKS"];
    NSString *version = [infoDictionary objectForKey:@"CFBundleVersion"];

    self.title = [NSString stringWithFormat:@"GENIUS READER",name,version];

    TapLabel.backgroundColor = [UIColor clearColor];
    TapLabel.textColor = [UIColor whiteColor];
    TapLabel.textAlignment = UITextAlignmentCenter;
    TapLabel.font = [UIFont systemFontOfSize:24.0f];

    UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleSingleTap:)];
    singleTap.numberOfTouchesRequired = 1; singleTap.numberOfTapsRequired = 1; //singleTap.delegate = self;
    [self.view addGestureRecognizer:singleTap];

}


- (void)viewDidUnload
{
    [super viewDidUnload];
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return YES;
}


-(void)handleSingleTap:(UITapGestureRecognizer *)recognizer
{

    NSInteger Totalpages;

    NSURL *pdfURL = [[NSBundle mainBundle] URLForResource:@"fw4" withExtension:@"pdf"];

    CGPDFDocumentRef myDocument;

    myDocument = CGPDFDocumentCreateWithURL((__bridge CFURLRef) pdfURL);// 1

    if (myDocument == NULL) {// 2

        CFRelease ((__bridge CFURLRef)pdfURL);
    }

    CFRelease ((__bridge CFURLRef) pdfURL);

    Totalpages =   CGPDFDocumentGetNumberOfPages(myDocument);

    if (Totalpages == 0) {// 5
        CGPDFDocumentRelease(myDocument);
        }

    CGPDFPageRef PDFPage = CGPDFDocumentGetPage(myDocument, 1);


    //[c setPDFPage:PDFPage];


    //PDFScrollView *PDFview = [[PDFScrollView alloc] init];
    //[PDFview setPDFPage:PDFPage];
    //[self.view addSubview:[singleton glpData].testsingleton]; 
    [(PDFScrollView *)self.view setPDFPage:PDFPage];

}

@end

Answer 1

看起来你只是使用了苹果在那个例子中给出的相同代码，

如果您正在使用IBOutlets，请确保已连接IBOutlets

(or)

如果您不使用IB，请确保已在viewDidLoad中启动了PDFScrollView

参考这个答案 - ＆gt; ZoomingPDFViewer example error

使用Apple的ZoomingPDFViewer源代码显示iPad PDF文件

1 个答案: