- 創(chuàng)建Document
PDFDocument就等同 PDF文件,需要借助PDFView顯示出來
- (void)createDocument {
NSString *pdfPath = [[NSBundle mainBundle] pathForResource:@"Sample.pdf" ofType:nil];
NSURL * url = [NSURL fileURLWithPath:pdfPath];
PDFDocument *document =[ [PDFDocument alloc] initWithURL:url];
if (document) {
self.pdfView.document = document;
self.pdfView.autoScales = YES;
self.pdfView.backgroundColor = [UIColor lightGrayColor];
}
}
- 修改PDF的顯示模式
顯示模式有4種
singlePage：單頁顯示枢赔，滾動只影響當(dāng)前頁
singlePageContinuous ：顯示全部頁面嗜逻，默認(rèn)垂直排列
twoUp： 雙頁顯示，滾動只影響當(dāng)前2頁
twoUpContinuous： 顯示所有頁，雙頁顯示
滾動方向：水平和垂直
self.pdfView.displayMode = kPDFDisplayTwoUpContinuous;
self.pdfView.displayDirection = kPDFDisplayDirectionVertical;
- 取出某頁的縮略圖
PDF的每一頁由PDFPage類管理
- (void)createThumbnails {
PDFPage *page = [self.document pageAtIndex:0];
CGSize size = CGSizeMake(300, 300);
UIImage *image = [page thumbnailOfSize:size forBox:kPDFDisplayBoxCropBox];
UIImageView * imageview = [[UIImageView alloc] initWithImage:image];
imageview.frame = CGRectMake(10, 200, 300, 300);
[self.view addSubview:imageview];
}
- 添加掛件Annotation
可以添加文本患雇，checkBox前硫，選擇框等等到PDFPage，其掛件的frame要基于Page的大小確定涡扼。
fieldName用于給掛件分組稼跳。清空事件可以用到
buttonWidgetStateString相當(dāng)掛件的ID，用來區(qū)分是否多選或單選
/**
創(chuàng)建文本輸入框
@param bounds <#bounds description#>
@param fieldName <#fieldName description#>
@return <#return value description#>
*/
- (PDFAnnotation *)textWidgetWithBounds:(CGRect)bounds filedName:(NSString *)fieldName {
PDFAnnotation *textWidget = [[PDFAnnotation alloc] initWithBounds:bounds forType:PDFAnnotationSubtypeText withProperties:nil];
textWidget.fieldName = fieldName;
textWidget.font = [UIFont systemFontOfSize:18];
return textWidget;
}
textWidget.maximumLength = 10; //限制文本長度
textWidget.hasComb = YES; //等分間距
/**
創(chuàng)建選擇按鈕
@param fieldName <#fieldName description#>
@param state <#state description#>
@param bounds <#bounds description#>
@return <#return value description#>
*/
- (PDFAnnotation *)radiobuttonWithFieldName:(NSString *)fieldName state:(NSString *)state bounds:(CGRect)bounds {
PDFAnnotation * button = [[PDFAnnotation alloc] initWithBounds:bounds forType:PDFAnnotationWidgetSubtypeButton withProperties:nil];
button.widgetFieldType = PDFAnnotationWidgetSubtypeButton;
button.widgetControlType = kPDFWidgetRadioButtonControl;
button.buttonWidgetStateString = state;
return button;
}
- 自定義事件 （清除填寫記錄）
創(chuàng)建一個掛件類型為 kPDFWidgetPushButtonControl 的按鈕吃沪，PDFActionResetForm類配置清除屬性汤善。clearButton.action = resetFormAction;最后賦值給按鈕
- (void)clearAction {
CGRect clearButtonBounds = CGRectMake(0, 0, 1, 1);
PDFAnnotation *clearButton = [[PDFAnnotation alloc] initWithBounds:clearButtonBounds forType:PDFAnnotationSubtypeWidget withProperties:nil];
clearButton.widgetFieldType = PDFAnnotationWidgetSubtypeButton;
clearButton.widgetControlType = kPDFWidgetPushButtonControl;
clearButton.caption = @"Clear";
clearButton.fieldName = @"Clear";
PDFPage *page = [self.document pageAtIndex:0];
[page addAnnotation:clearButton];
PDFActionResetForm *resetFormAction = [[PDFActionResetForm alloc] init];
resetFormAction.fields = @[@"A",@"B",@"C"];
resetFormAction.fieldsIncludedAreCleared = NO; //FieldName為 @[@"A",@"B",@"C"] 的掛件，不清楚記錄
clearButton.action = resetFormAction;
}
- 保存 PDF
- (void)saveDocument {
PDFPage *page = [self.document pageAtIndex:0];
if (page == nil) {
return;
}
NSString *pdfName = nil;
for (PDFAnnotation *annotation in page.annotations) {
if ([annotation.fieldName isEqualToString:@"xxx"]) {
[page removeAnnotation:annotation]; //根據(jù)需求決定是否移除某些掛件
}
else if([annotation.fieldName isEqualToString:@"name"]){
pdfName = annotation.widgetStringValue; //取出用戶添加的內(nèi)容作為文件名
}
}
if (pdfName) {
pdfName = [pdfName stringByReplacingOccurrencesOfString:@" " withString:@"_"];
pdfName = [NSString stringWithFormat:@"%@.pdf",pdfName];
NSString* documentDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject];
NSString * filePath = [NSString stringWithFormat:@"%@%@",documentDir,pdfName];
// 保存并設(shè)置密碼
[self.document writeToURL:[NSURL URLWithString:filePath] withOptions:@{PDFDocumentOwnerPasswordOption:@"mima"}];
}
}
- PDF只讀
PDFPage *page = [self.document pageAtIndex:0];
if (page) {
if (self.document.isEncrypted || self.document.isLocked) {
for (PDFAnnotation *anntation in page.annotations) {
anntation.readOnly = YES; //設(shè)置后文件輸入框還是可以編輯不知是不是bug。
}
}
}
- 加水印
1.成為PDFDocument代理 有坑红淡，必須設(shè)置代理之后再將document賦值給PDFView不狮，否則不會調(diào)用
2.實(shí)現(xiàn)代理 - (Class)classForPage
3.實(shí)現(xiàn)自定類PDFPage，實(shí)現(xiàn)- (void)drawWithBox:(PDFDisplayBox)box toContext:(CGContextRef)context 方法
document.delegate = self;
self.pdfView.document = document; //正確
/*
self.pdfView.document = document;
document.delegate = self; 錯誤 代理不會調(diào)用
*/
#pragma mark - PDFDocumentDelegate
- (Class)classForPage {
return WaterMark.class;
}
@implementation WaterMark
- (void)drawWithBox:(PDFDisplayBox)box toContext:(CGContextRef)context {
[super drawWithBox:box toContext:context];
UIGraphicsPushContext(context);
CGContextSaveGState(context);
CGRect pageBounds = [self boundsForBox:box];
CGContextTranslateCTM(context, 0, pageBounds.size.height);
CGContextScaleCTM(context, 1.0, -1.0);
CGContextRotateCTM(context, M_PI_4);
NSString *str = @"水印 水印 水印";
NSDictionary *attributes = @{
NSForegroundColorAttributeName: [UIColor colorWithRed:0.5 green:0.5 blue:0.5 alpha:0.5],
NSFontAttributeName: [UIFont systemFontOfSize:64]
};
[str drawAtPoint:CGPointMake(250, 40) withAttributes:attributes];
CGContextRestoreGState(context);
UIGraphicsPopContext();
}
@end
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