Question

我需要使用AirPrinter打印照片并且已经编码但我的照片尺寸有一个问题。打印照片后，我可以看到输出照片尺寸太大 - 正确我想要打印A6（4 * 6英寸）照片。

我使用佳能MG3260作为空气打印机。

如果我可以解决这个问题，请帮助我。

截图 https://www.dropbox.com/s/1f6wa0waao56zqk/IMG_0532.jpg

代码

-(void)printPhotoWithImage:(UIImage *)image {

NSData *myData = UIImageJPEGRepresentation(image, 1.f); UIPrintInteractionController *pic = [UIPrintInteractionController sharedPrintController];

if (pic && [UIPrintInteractionController canPrintData:myData]) {

pic.delegate = self;
UIPrintInfo *pinfo = [UIPrintInfo printInfo];
pinfo.outputType = UIPrintInfoOutputPhoto;
pinfo.jobName = @"My Photo";
pinfo.duplex = UIPrintInfoDuplexLongEdge;

pic.printInfo = pinfo;
pic.showsPageRange = YES;
pic.printingItem = myData;

pic.printFormatter = format;
[format release];

void(^completionHandler)(UIPrintInteractionController *, BOOL, NSError *) = ^(UIPrintInteractionController *print, BOOL completed, NSError *error) {

[self resignFirstResponder];

if (!completed && error) {
    NSLog(@"--- print error! ---");
}

};

   [pic presentFromRect:CGRectMake((self.view.bounds.size.width - 64) + 27, (self.view.bounds.size.height - 16) + 55, 0, 0) inView:self.view animated:YES completionHandler:completionHandler];

}

 - (UIPrintPaper *)printInteractionController:(UIPrintInteractionController *)printInteractionController choosePaper:(NSArray *)paperList {

 CGSize pageSize = CGSizeMake(6 * 72, 4 * 72); return [UIPrintPaper bestPaperForPageSize:pageSize withPapersFromArray:paperList];

}

Answer 1

首先缩放图像然后用它来打印

+ (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;
}

如何在iOS中打印照片？

1 个答案: