我目前正在使用 Get PDF hyperlinks on iOS with Quartz 中的一些修改后的代码在 pdf 中搜索注释，然后在注释上放置按钮以进行导航。它目前正在传递整个 pdf，因为我希望它只是传递当前页面并在该页面上放置注释按钮。我已经浏览了关于这个主题的文档，该文档非常无望，并且已经研究了一天左右，但没有运气。
我确信我错过了一些愚蠢的东西，因此我们将不胜感激任何帮助。
- (id)initWithFrame:(CGRect)frame {
self = [super initWithFrame:(CGRect)frame];
if (self) {
self.backgroundColor = [UIColor clearColor];
NSString *pathToPdfDoc = [[NSBundle mainBundle] pathForResource:@"testpdf" ofType:@"pdf"];
NSURL *pdfUrl = [NSURL fileURLWithPath:pathToPdfDoc];
document = CGPDFDocumentCreateWithURL((CFURLRef)pdfUrl);
currentPage = 1;
}
return self;
}
-(void)drawRect:(CGRect)inRect{
if(document) {
CGPDFPageRef page = CGPDFDocumentGetPage(document, currentPage);
CGContextRef ctx = UIGraphicsGetCurrentContext();
CGContextSaveGState(ctx);
CGContextTranslateCTM(ctx, 0.0, [self bounds].size.height);
CGContextScaleCTM(ctx, 1.0, -1.0);
CGContextConcatCTM(ctx, CGPDFPageGetDrawingTransform(page, kCGPDFCropBox, [self bounds], 0, true));
CGContextDrawPDFPage(ctx, page);
CGContextRestoreGState(ctx);
int pageCount = CGPDFDocumentGetNumberOfPages (document);
for(i=0; i<=currentPage; i++) {
CGPDFPageRef page = CGPDFDocumentGetPage(document, i+1);
CGPDFDictionaryRef pageDictionary = CGPDFPageGetDictionary(page);
CGPDFArrayRef outputArray;
if(!CGPDFDictionaryGetArray(pageDictionary, "Annots", &outputArray)) {
break;
}
int arrayCount = CGPDFArrayGetCount( outputArray );
if(!arrayCount) {
continue;
}
for( int j = 0; j < arrayCount; ++j ) {
CGPDFObjectRef aDictObj;
if(!CGPDFArrayGetObject(outputArray, j, &aDictObj)) {
break;
}
NSLog(@"poop2");
CGPDFDictionaryRef annotDict;
if(!CGPDFObjectGetValue(aDictObj, kCGPDFObjectTypeDictionary, &annotDict)) {
break;
}
CGPDFDictionaryRef aDict;
if(!CGPDFDictionaryGetDictionary(annotDict, "A", &aDict)) {
break;
}
CGPDFStringRef uriStringRef;
if(!CGPDFDictionaryGetString(aDict, "URI", &uriStringRef)) {
break;
}
CGPDFArrayRef rectArray;
if(!CGPDFDictionaryGetArray(annotDict, "Rect", &rectArray)) {
break;
}
int arrayCount = CGPDFArrayGetCount( rectArray );
CGPDFReal coords[4];
for( int k = 0; k < arrayCount; ++k ) {
CGPDFObjectRef rectObj;
if(!CGPDFArrayGetObject(rectArray, k, &rectObj)) {
break;
}
CGPDFReal coord;
if(!CGPDFObjectGetValue(rectObj, kCGPDFObjectTypeReal, &coord)) {
break;
}
coords[k] = coord;
}
char *uriString = (char *)CGPDFStringGetBytePtr(uriStringRef);
NSString *uri = [NSString stringWithCString:uriString encoding:NSUTF8StringEncoding];
if (950 <= coords[3] && coords[3] < 1000){
coords[3]= (coords[3]*1.01);
coords[1]= (coords[1]*1.01)-10;
}
else if (900 <= coords[3] && coords[3] < 949){
coords[3]= (coords[3]*1.02);
coords[1]= (coords[1]*1.02)-10;
}
else if (850 <= coords[3] && coords[3] < 899){
coords[3]= (coords[3]*1.03);
coords[1]= (coords[1]*1.03)-10;
}
else if (800 <= coords[3] && coords[3] < 849){
coords[3]= (coords[3]*1.035);
coords[1]= (coords[1]*1.035)-10;
}
else if (750 <= coords[3] && coords[3] < 799){
coords[3]= (coords[3]*1.04);
coords[1]= (coords[1]*1.04)-10;
}
else if (700 <= coords[3] && coords[3] < 749){
coords[3]= (coords[3]*1.05);
coords[1]= (coords[1]*1.05)-10;
}
else if (650 <= coords[3] && coords[3] < 699){
coords[3]= (coords[3]*1.06);
coords[1]= (coords[1]*1.06)-10;
}
else if (600 <= coords[3] && coords[3] < 649){
coords[3]= (coords[3]*1.075);
coords[1]= (coords[1]*1.075)-10;
}
else if (550 <= coords[3] && coords[3] < 599){
coords[3]= (coords[3]*1.09);
coords[1]= (coords[1]*1.09)-10;
}
else if (500 <= coords[3] && coords[3] < 549){
coords[3]= (coords[3]*1.1);
coords[1]= (coords[1]*1.1)-10;
}
else if (450 <= coords[3] && coords[3] < 499){
coords[3]= (coords[3]*1.13);
coords[1]= (coords[1]*1.13)-10;
}
else if (400 <= coords[3] && coords[3] < 449){
coords[3]= (coords[3]*1.15);
coords[1]= (coords[1]*1.15)-10;
}
else if (300 <= coords[3] && coords[3] < 399){
coords[3]= (coords[3]*1.18);
coords[1]= (coords[1]*1.18)-10;
}
else if (250 <= coords[3] && coords[3] < 299){
coords[3]= (coords[3]*1.30);
coords[1]= (coords[1]*1.30)-10;
}
else if (200 <= coords[3] && coords[3] < 249){
coords[3]= (coords[3]*1.4);
coords[1]= (coords[1]*1.4)-10;
}
else if (150 <= coords[3] && coords[3] < 199){
coords[3]= (coords[3]*1.6);
coords[1]= (coords[1]*1.6)-10;
}
else if (100 <= coords[3] && coords[3] < 149){
coords[3]= (coords[3]*1.8);
coords[1]= (coords[1]*1.8)-10;
}
else if (50 <= coords[3] && coords[3] < 99){
coords[3]= (coords[3]*2);
coords[1]= (coords[1]*2)-10;
}
else if (0 <= coords[3] && coords[3] < 49){
coords[3]= (coords[3]*2.5);
coords[1]= (coords[1]*2.5-10);
}
CGRect rect = CGRectMake(coords[0] /1.11, coords[1],coords[2],coords[3]);
CGPDFInteger pageRotate = 0;
CGPDFDictionaryGetInteger( pageDictionary, "Rotate", &pageRotate );
CGRect pageRect = CGRectIntegral( CGPDFPageGetBoxRect( page, kCGPDFMediaBox ));
if( pageRotate == 90 || pageRotate == 270 ) {
CGFloat temp = pageRect.size.width;
pageRect.size.width = pageRect.size.height;
pageRect.size.height = temp;
}
rect.size.width -= rect.origin.x;
rect.size.height -= rect.origin.y;
CGAffineTransform trans = CGAffineTransformIdentity;
trans = CGAffineTransformTranslate(trans, 0, pageRect.size.height);
trans = CGAffineTransformScale(trans, 1.0, -1.0);
rect = CGRectApplyAffineTransform(rect, trans);
// do whatever you need with the coordinates.
// e.g. you could create a button and put it on top of your page
// and use it to open the URL with UIApplication's openURL
url = [NSURL URLWithString:uri];
CGPDFContextSetURLForRect(ctx, (CFURLRef)url, rect);
buttonArray = [[NSMutableArray alloc] init];
for(NSInteger b = 0; b < CGPDFArrayGetCount(outputArray); b++){
button = [[UIButton alloc] initWithFrame:rect];
[button setTitle:@"" forState:UIControlStateNormal];
[button setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
[button setBackgroundColor:[UIColor blueColor]];
[button.titleLabel setBackgroundColor:[UIColor clearColor]];
button.tag = currentPage;
[button addTarget:self action:@selector(openLink:) forControlEvents:UIControlEventTouchUpInside];
[self addSubview:button];
[buttonArray addObject:button];
}
NSLog(@"%i", CGPDFArrayGetCount(buttonArray));
}
}
}
}
最佳答案
所以这一行:
for(i=0; i<=currentPage; i++) {
循环(迭代)从第一页到当前页的所有页面。您应该删除该循环(带有关联的 })，然后更改此行:
CGPDFPageRef page = CGPDFDocumentGetPage(document, i+1);
到此
CGPDFPageRef page = CGPDFDocumentGetPage(document, currentPage);
您在 initWithFrame 中将 currentPage 设置为 1。这将为您提供当前页面。
关于iphone - 在 iOS 上使用 Quartz 获取当前页面的 PDF 超链接，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/6367878/