#import <UIKit/UIKit.h>
@class PDFTestViewController;
@interface PDFView : UIView {
//这个类封装了PDF画图得所有信息
CGPDFDocumentRef pdf;
//PDFDocument 中得一页
CGPDFPageRef page;
//总共页数
int totalPages;
//当前得页面
int currentPage;
PDFTestViewController *pdftest;
}
@property(nonatomic,retain)IBOutlet PDFTestViewController *pdftest;
//当前视图初始化类，在该方法中会创建一个CGPDFDocuemntRef对象，传递一个PDF文件得名字，和所需要页面得大小，
- (id)initWithFrame:(CGRect)frame andFileName:(NSString *)fileName;
//创建一个PDF对象，此方法在初始化方法中被调用
- (CGPDFDocumentRef)createPDFFromExistFile:(NSString *)aFilePath;
-(void)reloadView;
/*
页面之间得跳转
*/
-(void)goUpPage;
-(void)goDownPage;
@end
//
// PDFView.m
// PDFViewTest
//
// Created by Evan Lynn on 10-6-20.
// Copyright 2010 Tera Age. All rights reserved.
//
#import "PDFView.h"
//#import "PDFTestViewController.h"
@implementation PDFView
@synthesize pdftest;
- (id)initWithFrame:(CGRect)frame andFileName:(NSString *)fileName{
if (self = [super initWithFrame:frame]) {
NSString *dataPathFromApp = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:fileName];
pdf = [self createPDFFromExistFile:dataPathFromApp];
self.backgroundColor = [UIColor clearColor];
}
return self;
}
- (CGPDFDocumentRef)createPDFFromExistFile:(NSString *)aFilePath{
CFStringRef path;
CFURLRef url;
CGPDFDocumentRef document;
path = CFStringCreateWithCString(NULL, [aFilePath UTF8String], kCFStringEncodingUTF8);
url = CFURLCreateWithFileSystemPath(NULL, path, kCFURLPOSIXPathStyle, NO);
CFRelease(path);
document = CGPDFDocumentCreateWithURL(url);
CFRelease(url);
totalPages = CGPDFDocumentGetNumberOfPages(document);
currentPage=1;
if (totalPages == 0) {
return NULL;
}
return document;
}
- (void)drawRect:(CGRect)rect {
//得到绘图上下文环境
CGContextRef context = UIGraphicsGetCurrentContext();
//得到一个PDF页面
page = CGPDFDocumentGetPage(pdf, currentPage);
/*进行坐标转换向右移动100个单位，并且向下移动当前视图得高度，
这是因为Quartz画图得坐标系统是以左下角为开始点，但iphone视图是以左上角为开始点
*/
CGContextTranslateCTM(context, 100.0,self.bounds.size.height);
//转变坐标系
CGContextScaleCTM(context, 1.0, -1);
CGContextDrawPDFPage(context, page);
}
- (void)dealloc {
[super dealloc];
}
-(void)reloadView{
[self setNeedsDisplay];
}
-(void)goUpPage{
if(currentPage < 2)
return;
--currentPage;
[self reloadView];
}
-(void)goDownPage{
if(currentPage >=totalPages)
return;
++currentPage;
[self reloadView];
}
@end