我创建了自己的类，以便在 iOS7 中尽可能轻松地创建 pdf。如果有人需要，这里是：
PDFHelper.h
#import <Foundation/Foundation.h>
@interface PDF : NSObject{
}
@property(nonatomic, readwrite) CGSize size;
@property(nonatomic, strong) NSMutableArray *headerRect;
@property(nonatomic, strong) NSMutableArray *header;
@property(nonatomic, strong) NSMutableArray *imageArray;
@property(nonatomic, strong) NSMutableArray *imageRectArray;
@property(nonatomic, strong) NSMutableArray *textArray;
@property(nonatomic, strong) NSMutableArray *textRectArray;
@property(nonatomic, strong) NSMutableData *data;
+ (UIImage *)imageWithImage:(UIImage *)image scaledToSize:(CGSize)newSize;
// i metodi vanno invocati nel seguente ordine:
-(void)initContent;
-(void)addImageWithRect:(UIImage*)image inRect:(CGRect)rect;
-(void)addTextWithRect:(NSString*)text inRect:(CGRect)rect;
-(void)addHeadertWithRect:(NSString *)text inRect:(CGRect)rect;
- (void) drawText;
- (void) drawHeader;
- (void) drawImage;
- (NSMutableData*) generatePdfWithFilePath: (NSString *)thefilePath;
@end
PDFHelper.m
#import "PDF.h"
@implementation PDF
@synthesize size, imageArray, header, imageRectArray, textArray, textRectArray, data, headerRect;
-(void)initContent{
imageArray = [[NSMutableArray alloc]init];
imageRectArray = [[NSMutableArray alloc]init];
textArray = [[NSMutableArray alloc]init];
textRectArray = [[NSMutableArray alloc]init];
header = [[NSMutableArray alloc]init];
headerRect = [[NSMutableArray alloc]init];
data = [NSMutableData data];
// data = [NSMutableData data];
}
- (void) drawHeader
{
for (int i = 0; i < [header count]; i++) {
CGContextRef currentContext = UIGraphicsGetCurrentContext();
CGContextSetRGBFillColor(currentContext, 0.0, 0.0, 0.0, 1.0);
NSString *textToDraw = [header objectAtIndex:i];
NSLog(@"Text to draw: %@", textToDraw);
CGRect renderingRect = [[headerRect objectAtIndex:i]CGRectValue];
NSLog(@"x of rect is %f", renderingRect.origin.x);
UIFont*font = [UIFont fontWithName:@"HelveticaNeue-Light" size:30.0];
UIColor*color = [UIColor colorWithRed:255/255.0 green:79/255.0 blue:79/255.0 alpha:1.0];
NSDictionary*att = @{NSFontAttributeName: font, NSForegroundColorAttributeName:color};
NSStringDrawingContext *context = [NSStringDrawingContext new];
context.minimumScaleFactor = 0.1;
// [textToDraw drawInRect:renderingRect withAttributes:att];
[textToDraw drawWithRect:renderingRect options:NSStringDrawingUsesLineFragmentOrigin attributes:att context:context];
}
}
-(void)drawImage{
for (int i = 0; i < [imageArray count]; i++) {
[[imageArray objectAtIndex:i] drawInRect:[[imageRectArray objectAtIndex:i]CGRectValue]];
}
}
- (void) drawText
{
for (int i = 0; i < [textArray count]; i++) {
CGContextRef currentContext = UIGraphicsGetCurrentContext();
CGContextSetRGBFillColor(currentContext, 0.0, 0.0, 0.0, 1.0);
NSString *textToDraw = [textArray objectAtIndex:i];
NSLog(@"Text to draw: %@", textToDraw);
CGRect renderingRect = [[textRectArray objectAtIndex:i]CGRectValue];
NSLog(@"x of rect is %f", renderingRect.origin.x);
UIFont*font = [UIFont fontWithName:@"HelveticaNeue-Light" size:22.0];
UIColor*color = [UIColor blackColor];
NSDictionary*att = @{NSFontAttributeName: font, NSForegroundColorAttributeName:color};
[textToDraw drawWithRect:renderingRect options:NSStringDrawingUsesLineFragmentOrigin attributes:att context:nil];
}
}
+ (UIImage *)imageWithImage:(UIImage *)image scaledToSize:(CGSize)newSize {
//UIGraphicsBeginImageContext(newSize);
UIGraphicsBeginImageContextWithOptions(newSize, NO, 0.0);
[image drawInRect:CGRectMake(0, 0, newSize.width, newSize.height)];
UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newImage;
}
-(void)addImageWithRect:(UIImage *)image inRect:(CGRect)rect{
UIImage *newImage = [PDF imageWithImage:image scaledToSize:CGSizeMake(rect.size.width, rect.size.height)];
[imageArray addObject:newImage];
[imageRectArray addObject:[NSValue valueWithCGRect:rect]];
}
-(void)addTextWithRect:(NSString *)text inRect:(CGRect)rect{
[textArray addObject:text];
[textRectArray addObject:[NSValue valueWithCGRect:rect]];
}
-(void)addHeadertWithRect:(NSString *)text inRect:(CGRect)rect{
[header addObject:text];
[headerRect addObject:[NSValue valueWithCGRect:rect]];
}
- (NSMutableData*) generatePdfWithFilePath: (NSString *)thefilePath
{
UIGraphicsBeginPDFContextToFile(thefilePath, CGRectZero, nil);
BOOL done = NO;
do
{
//Start a new page.
UIGraphicsBeginPDFPageWithInfo(CGRectMake(0, 0, size.width, size.height), nil);
//Draw Header
[self drawHeader];
//Draw Text
[self drawText];
//Draw an image
[self drawImage];
done = YES;
}
while (!done);
// Close the PDF context and write the contents out.
UIGraphicsEndPDFContext();
//For data
UIGraphicsBeginPDFContextToData(data, CGRectZero, nil);
BOOL done1 = NO;
do
{
//Start a new page.
UIGraphicsBeginPDFPageWithInfo(CGRectMake(0, 0, size.width, size.height), nil);
//Draw Header
[self drawHeader];
//Draw Text
[self drawText];
//Draw an image
[self drawImage];
done1 = YES;
}
while (!done1);
// Close the PDF context and write the contents out.
UIGraphicsEndPDFContext();
return data;
}
现在在类中导入 PDf.h 并使用类似这样的东西来创建和绘制你的 pdf：
-(void)CreaPDFconPath:(NSString*)pdfFilePath{
UIFont*font = [UIFont fontWithName:@"HelveticaNeue-Light" size:22.0];
UIColor*color = [UIColor blackColor];
NSDictionary*att = @{NSFontAttributeName: font, NSForegroundColorAttributeName:color};
NSString* text = [NSString stringWithFormat:@"%@ \n\n%@", self.ingredienti.text, self.preparazione.text];
CGFloat stringSize = [text boundingRectWithSize:CGSizeMake(980, CGFLOAT_MAX)// use CGFLOAT_MAX to dinamically calculate the height of a string
options:NSStringDrawingUsesLineFragmentOrigin
attributes:att context:nil].size.height;
//creo pdf e vi aggiungo testo e immagini
PDF*pdfFile = [[PDF alloc]init];
[pdfFile initContent];
[pdfFile setSize:CGSizeMake(1000, 400+stringSize)];
[pdfFile addHeadertWithRect:self.fieldNome.text inRect:CGRectMake(10, 10, 980, 60)];
[pdfFile addImageWithRect:self.image.image inRect:CGRectMake(10, 80, 250, 250)];
NSString*stringInfo = [NSString stringWithFormat:@"%@:%@ \n\n%@",self.oreCottura.text,self.minutiDiCottura.text,self.numeroPersone.text];
[pdfFile addHeadertWithRect:stringInfo inRect:CGRectMake(300, 190, 500, 120)];
[pdfFile addTextWithRect:text inRect:CGRectMake(10, 350, 980, CGFLOAT_MAX)];
//disegno header immagine e testo
[pdfFile drawHeader];
[pdfFile drawImage];
[pdfFile drawText];
//genero pdf
[pdfFile generatePdfWithFilePath:pdfFilePath];
}