我已将问题放在表格列表中。当我检查每个 tableRow 时，问题应该在下一行动态添加到 UITextView。一旦整个 TextView 被填满，我们就可以保存这个带有问题的 textView 页面。这可能吗？
现在，我为每个问题采用了 6 个不同的 Textview，这些问题被转换为 PDF 页面。
提前感谢您的代码/建议:)
问问题
108 次
1 回答
7
要创建 pdf 文档，请使用以下代码
//
// ViewController.h
// PDFProject
//
#import <UIKit/UIKit.h>
#import <QuartzCore/QuartzCore.h>
#import <CoreText/CoreText.h>
#define kBorderInset 20.0
#define kBorderWidth 1.0
#define kMarginInset 10.0
//Line drawing
#define kLineWidth 1.0
@interface ViewController : UIViewController
{
CGSize pageSize;
}
- (IBAction)generatePdfButtonPressed:(id)sender;
@end
视图控制器.m
#import "ViewController.h"
@interface ViewController ()
- (void) generatePdfWithFilePath: (NSString *)thefilePath;
- (void)drawPageNumber:(NSInteger)pageNum;
- (void) drawBorder;
- (void) drawText;
- (void) drawHeader;
- (void) drawImage;
@end
@implementation ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void) drawBorder
{
CGContextRef currentContext = UIGraphicsGetCurrentContext();
UIColor *borderColor = [UIColor brownColor];
CGRect rectFrame = CGRectMake(kBorderInset, kBorderInset, pageSize.width-kBorderInset*2, pageSize.height-kBorderInset*2);
CGContextSetStrokeColorWithColor(currentContext, borderColor.CGColor);
CGContextSetLineWidth(currentContext, kBorderWidth);
CGContextStrokeRect(currentContext, rectFrame);
}
- (void)drawPageNumber:(NSInteger)pageNumber
{
NSString* pageNumberString = [NSString stringWithFormat:@"Page %d", pageNumber];
UIFont* theFont = [UIFont systemFontOfSize:12];
CGSize pageNumberStringSize = [pageNumberString sizeWithFont:theFont
constrainedToSize:pageSize
lineBreakMode:UILineBreakModeWordWrap];
CGRect stringRenderingRect = CGRectMake(kBorderInset,
pageSize.height - 40.0,
pageSize.width - 2*kBorderInset,
pageNumberStringSize.height);
[pageNumberString drawInRect:stringRenderingRect withFont:theFont lineBreakMode:UILineBreakModeWordWrap alignment:NSTextAlignmentCenter];
}
- (void) drawHeader
{
CGContextRef currentContext = UIGraphicsGetCurrentContext();
CGContextSetRGBFillColor(currentContext, 0.3, 0.7, 0.2, 1.0);
NSString *textToDraw = @"Pdf Demo - iOSLearner.com";
UIFont *font = [UIFont systemFontOfSize:24.0];
CGSize stringSize = [textToDraw sizeWithFont:font constrainedToSize:CGSizeMake(pageSize.width - 2*kBorderInset-2*kMarginInset, pageSize.height - 2*kBorderInset - 2*kMarginInset) lineBreakMode:UILineBreakModeWordWrap];
CGRect renderingRect = CGRectMake(kBorderInset + kMarginInset, kBorderInset + kMarginInset, pageSize.width - 2*kBorderInset - 2*kMarginInset, stringSize.height);
[textToDraw drawInRect:renderingRect withFont:font lineBreakMode:UILineBreakModeWordWrap alignment:NSTextAlignmentLeft];
}
- (void) drawText
{
CGContextRef currentContext = UIGraphicsGetCurrentContext();
CGContextSetRGBFillColor(currentContext, 0.0, 0.0, 0.0, 1.0);
NSString *textToDraw = @"Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi. Nam liber tempor cum soluta nobis eleifend option congue nihil imperdiet doming id quod mazim placerat facer possim assum. Typi non habent claritatem insitam; est usus legentis in iis qui facit eorum claritatem. Investigationes demonstraverunt lectores legere me lius quod ii legunt saepius. Claritas est etiam processus dynamicus, qui sequitur mutationem consuetudium lectorum. Mirum est notare quam littera gothica, quam nunc putamus parum claram, anteposuerit litterarum formas humanitatis per seacula quarta decima et quinta decima. Eodem modo typi, qui nunc nobis videntur parum clari, fiant sollemnes in futurum.";
UIFont *font = [UIFont systemFontOfSize:14.0];
CGSize stringSize = [textToDraw sizeWithFont:font
constrainedToSize:CGSizeMake(pageSize.width - 2*kBorderInset-2*kMarginInset, pageSize.height - 2*kBorderInset - 2*kMarginInset)
lineBreakMode:UILineBreakModeWordWrap];
CGRect renderingRect = CGRectMake(kBorderInset + kMarginInset, kBorderInset + kMarginInset + 50.0, pageSize.width - 2*kBorderInset - 2*kMarginInset, stringSize.height);
[textToDraw drawInRect:renderingRect
withFont:font
lineBreakMode:UILineBreakModeWordWrap
alignment:NSTextAlignmentLeft];
}
- (void) drawLine
{
CGContextRef currentContext = UIGraphicsGetCurrentContext();
CGContextSetLineWidth(currentContext, kLineWidth);
CGContextSetStrokeColorWithColor(currentContext, [UIColor blueColor].CGColor);
CGPoint startPoint = CGPointMake(kMarginInset + kBorderInset, kMarginInset + kBorderInset + 40.0);
CGPoint endPoint = CGPointMake(pageSize.width - 2*kMarginInset -2*kBorderInset, kMarginInset + kBorderInset + 40.0);
CGContextBeginPath(currentContext);
CGContextMoveToPoint(currentContext, startPoint.x, startPoint.y);
CGContextAddLineToPoint(currentContext, endPoint.x, endPoint.y);
CGContextClosePath(currentContext);
CGContextDrawPath(currentContext, kCGPathFillStroke);
}
- (void) drawImage
{
UIImage * demoImage = [UIImage imageNamed:@"demo.png"];
[demoImage drawInRect:CGRectMake( (pageSize.width - demoImage.size.width/2)/2, 350, demoImage.size.width/2, demoImage.size.height/2)];
}
- (void) generatePdfWithFilePath: (NSString *)thefilePath
{
UIGraphicsBeginPDFContextToFile(thefilePath, CGRectZero, nil);
NSInteger currentPage = 0;
BOOL done = NO;
do
{
//Start a new page.
UIGraphicsBeginPDFPageWithInfo(CGRectMake(0, 0, pageSize.width, pageSize.height), nil);
//Draw a page number at the bottom of each page.
currentPage++;
[self drawPageNumber:currentPage];
//Draw a border for each page.
[self drawBorder];
//Draw text fo our header.
[self drawHeader];
//Draw a line below the header.
[self drawLine];
//Draw some text for the page.
[self drawText];
//Draw an image
[self drawImage];
done = YES;
}
while (!done);
// Close the PDF context and write the contents out.
UIGraphicsEndPDFContext();
}
#pragma mark - View lifecycle
- (void)viewDidUnload
{
[super viewDidUnload];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
- (IBAction)generatePdfButtonPressed:(id)sender
{
pageSize = CGSizeMake(612, 792);
NSString *fileName = @"Demo.pdf";
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *pdfFileName = [documentsDirectory stringByAppendingPathComponent:fileName];
[self generatePdfWithFilePath:pdfFileName];
}
@end
于 2013-09-18T12:10:11.423 回答