ios epub电子书阅读器demo

最新推荐文章于 2024-09-02 09:55:56 发布

MOKA

最新推荐文章于 2024-09-02 09:55:56 发布

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demo功能：读取epub电子书的阅读器demo，可以更改字体大小，查询，按电子书章节索引。

demo说明：按照epub结构读取内容并显示。主要使用webview显示内容，章节内用js制作的翻页效果（效果不是很好，有点闪烁）。主要代码在：EPubViewController.m中。

demo截屏：

demo的主要代码：翻页控制部分

[csharp] view plain copy print ?

- (void) chapterDidFinishLoad:(Chapter *)chapter{
totalPagesCount+=chapter.pageCount;
if(chapter.chapterIndex + 1 < [loadedEpub.spineArray count]){
[[loadedEpub.spineArray objectAtIndex:chapter.chapterIndex+1] setDelegate:self];
[[loadedEpub.spineArray objectAtIndex:chapter.chapterIndex+1] loadChapterWithWindowSize:webView.bounds fontPercentSize:currentTextSize];
[currentPageLabel setText:[NSString stringWithFormat:@"?/%d", totalPagesCount]];
} else {
[currentPageLabel setText:[NSString stringWithFormat:@"%d/%d",[self getGlobalPageCount], totalPagesCount]];
[pageSlider setValue:(float)100*(float)[self getGlobalPageCount]/(float)totalPagesCount animated:YES];
paginating = NO;
NSLog(@"Pagination Ended!");
}
}
- (int) getGlobalPageCount{
int pageCount = 0;
for(int i=0; i<currentSpineIndex; i++){
pageCount+= [[loadedEpub.spineArray objectAtIndex:i] pageCount];
}
pageCount+=currentPageInSpineIndex+1;
return pageCount;
}
- (void) loadSpine:(int)spineIndex atPageIndex:(int)pageIndex {
[self loadSpine:spineIndex atPageIndex:pageIndex highlightSearchResult:nil];
}
- (void) loadSpine:(int)spineIndex atPageIndex:(int)pageIndex highlightSearchResult:(SearchResult*)theResult{
webView.hidden = YES;
self.currentSearchResult = theResult;
[chaptersPopover dismissPopoverAnimated:YES];
[searchResultsPopover dismissPopoverAnimated:YES];
NSURL* url = [NSURL fileURLWithPath:[[loadedEpub.spineArray objectAtIndex:spineIndex] spinePath]];
[webView loadRequest:[NSURLRequest requestWithURL:url]];
currentPageInSpineIndex = pageIndex;
currentSpineIndex = spineIndex;
if(!paginating){
[currentPageLabel setText:[NSString stringWithFormat:@"%d/%d",[self getGlobalPageCount], totalPagesCount]];
[pageSlider setValue:(float)100*(float)[self getGlobalPageCount]/(float)totalPagesCount animated:YES];
}
}
- (void) gotoPageInCurrentSpine:(int)pageIndex{
if(pageIndex>=pagesInCurrentSpineCount){
pageIndex = pagesInCurrentSpineCount - 1;
currentPageInSpineIndex = pagesInCurrentSpineCount - 1;
}
float pageOffset = pageIndex*webView.bounds.size.width;
//注入js 滚动到指定的坐标--js翻页效果
NSString* goToOffsetFunc = [NSString stringWithFormat:@" function pageScroll(xOffset){ window.scroll(xOffset,0); } "];
NSString* goTo =[NSString stringWithFormat:@"pageScroll(%f)", pageOffset];
[webView stringByEvaluatingJavaScriptFromString:goToOffsetFunc];
[webView stringByEvaluatingJavaScriptFromString:goTo];
if(!paginating){
[currentPageLabel setText:[NSString stringWithFormat:@"%d/%d",[self getGlobalPageCount], totalPagesCount]];
[pageSlider setValue:(float)100*(float)[self getGlobalPageCount]/(float)totalPagesCount animated:YES];
}
webView.hidden = NO;
}
- (void) gotoNextSpine {
if(!paginating){
if(currentSpineIndex+1<[loadedEpub.spineArray count]){
[self loadSpine:++currentSpineIndex atPageIndex:0];
}
}
}
- (void) gotoPrevSpine {
if(!paginating){
if(currentSpineIndex-1>=0){
[self loadSpine:--currentSpineIndex atPageIndex:0];
}
}
}
- (void) gotoNextPage {
if(!paginating){
if(currentPageInSpineIndex+1<pagesInCurrentSpineCount){
[self gotoPageInCurrentSpine:++currentPageInSpineIndex];
} else {
[self gotoNextSpine];
}
}
}
- (void) gotoPrevPage {
if (!paginating) {
if(currentPageInSpineIndex-1>=0){
[self gotoPageInCurrentSpine:--currentPageInSpineIndex];
} else {
if(currentSpineIndex!=0){
int targetPage = [[loadedEpub.spineArray objectAtIndex:(currentSpineIndex-1)] pageCount];
[self loadSpine:--currentSpineIndex atPageIndex:targetPage-1];
}
}
}
}
- (IBAction) increaseTextSizeClicked:(id)sender{
if(!paginating){
if(currentTextSize+25<=200){
currentTextSize+=25;
[self updatePagination];
if(currentTextSize == 200){
[incTextSizeButton setEnabled:NO];
}
[decTextSizeButton setEnabled:YES];
}
}
}
- (IBAction) decreaseTextSizeClicked:(id)sender{
if(!paginating){
if(currentTextSize-25>=50){
currentTextSize-=25;
[self updatePagination];
if(currentTextSize==50){
[decTextSizeButton setEnabled:NO];
}
[incTextSizeButton setEnabled:YES];
}
}
}
- (IBAction) doneClicked:(id)sender{
[self dismissModalViewControllerAnimated:YES];
}
- (IBAction) slidingStarted:(id)sender{
int targetPage = ((pageSlider.value/(float)100)*(float)totalPagesCount);
if (targetPage==0) {
targetPage++;
}
[currentPageLabel setText:[NSString stringWithFormat:@"%d/%d", targetPage, totalPagesCount]];
}
- (IBAction) slidingEnded:(id)sender{
int targetPage = (int)((pageSlider.value/(float)100)*(float)totalPagesCount);
if (targetPage==0) {
targetPage++;
}
int pageSum = 0;
int chapterIndex = 0;
int pageIndex = 0;
for(chapterIndex=0; chapterIndex<[loadedEpub.spineArray count]; chapterIndex++){
pageSum+=[[loadedEpub.spineArray objectAtIndex:chapterIndex] pageCount];
// NSLog(@"Chapter %d, targetPage: %d, pageSum: %d, pageIndex: %d", chapterIndex, targetPage, pageSum, (pageSum-targetPage));
if(pageSum>=targetPage){
pageIndex = [[loadedEpub.spineArray objectAtIndex:chapterIndex] pageCount] - 1 - pageSum + targetPage;
break;
}
}
[self loadSpine:chapterIndex atPageIndex:pageIndex];
}
- (IBAction) showChapterIndex:(id)sender{
if(chaptersPopover==nil){
ChapterListViewController* chapterListView = [[ChapterListViewController alloc] initWithNibName:@"ChapterListViewController" bundle:[NSBundle mainBundle]];
[chapterListView setEpubViewController:self];
chaptersPopover = [[UIPopoverController alloc] initWithContentViewController:chapterListView];
[chaptersPopover setPopoverContentSize:CGSizeMake(400, 600)];
[chapterListView release];
}
if ([chaptersPopover isPopoverVisible]) {
[chaptersPopover dismissPopoverAnimated:YES];
}else{
[chaptersPopover presentPopoverFromBarButtonItem:chapterListButton permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
}
}
//webview 完成加载，将css注入。webview加载一次是一个epub里的xhtml内容，可能是一页，也可能是多页。
//可以看看demo中的.epub文件。将.epub改成zip 解压就可以看到epub的内容
- (void)webViewDidFinishLoad:(UIWebView *)theWebView{
NSString *varMySheet = @"var mySheet = document.styleSheets[0];";
NSString *addCSSRule = @"function addCSSRule(selector, newRule) {"
"if (mySheet.addRule) {"
"mySheet.addRule(selector, newRule);" // For Internet Explorer
"} else {"
"ruleIndex = mySheet.cssRules.length;"
"mySheet.insertRule(selector + '{' + newRule + ';}', ruleIndex);" // For Firefox, Chrome, etc.
"}"
"}";
NSString *insertRule1 = [NSString stringWithFormat:@"addCSSRule('html', 'padding: 0px; height: %fpx; -webkit-column-gap: 0px; -webkit-column-width: %fpx;')", webView.frame.size.height, webView.frame.size.width];
NSString *insertRule2 = [NSString stringWithFormat:@"addCSSRule('p', 'text-align: justify;')"];
NSString *setTextSizeRule = [NSString stringWithFormat:@"addCSSRule('body', '-webkit-text-size-adjust: %d%%;')", currentTextSize];
NSString *setHighlightColorRule = [NSString stringWithFormat:@"addCSSRule('highlight', 'background-color: yellow;')"];
[webView stringByEvaluatingJavaScriptFromString:varMySheet];
[webView stringByEvaluatingJavaScriptFromString:addCSSRule];
[webView stringByEvaluatingJavaScriptFromString:insertRule1];
[webView stringByEvaluatingJavaScriptFromString:insertRule2];
[webView stringByEvaluatingJavaScriptFromString:setTextSizeRule];
[webView stringByEvaluatingJavaScriptFromString:setHighlightColorRule];
if(currentSearchResult!=nil){
// NSLog(@"Highlighting %@", currentSearchResult.originatingQuery);
[webView highlightAllOccurencesOfString:currentSearchResult.originatingQuery];
}
int totalWidth = [[webView stringByEvaluatingJavaScriptFromString:@"document.documentElement.scrollWidth"] intValue];
pagesInCurrentSpineCount = (int)((float)totalWidth/webView.bounds.size.width);
[self gotoPageInCurrentSpine:currentPageInSpineIndex];
}
- (void) updatePagination{
if(epubLoaded){
if(!paginating){
NSLog(@"Pagination Started!");
paginating = YES;
totalPagesCount=0;
[self loadSpine:currentSpineIndex atPageIndex:currentPageInSpineIndex];
[[loadedEpub.spineArray objectAtIndex:0] setDelegate:self];
[[loadedEpub.spineArray objectAtIndex:0] loadChapterWithWindowSize:webView.bounds fontPercentSize:currentTextSize];
[currentPageLabel setText:@"?/?"];
}
}
}