弹出Airprint对话框,但在日志屏幕中它显示两个警告：
1)警告：在iPad上调用 – [UIPrintInteractionController presentAnimated：completionHandler：]
找不到PDF标题：找不到`％PDF’.
2)[UIPopoverController_commonPresentPopoverFromRect：
inView：allowedArrowDirections：animated：]：传入此方法的rect必须具有非零的宽度和高度.这将是未来版本中的一个例外.
我已经在网上搜索过,但发现所有解决方案都提供了常规的rect按钮
我在这里使用的是一个分段控件,我不知道在这种情况下如何使用这个控件
这是段控制代码：
- (IBAction)legalSegment:(id)sender {
switch (((UISegmentedControl *)sender).selectedSegmentIndex) {
case 0:
{
[self printItem];
break;
}
}
这是printItem方法：
-(void)printItem {
CGRect rect = CGRectMake(0,768,1004);
UIGraphicsBeginImageContext(rect.size);
CGContextRef context = UIGraphicsGetCurrentContext();
[self.view.layer renderInContext:context];
UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
UIPrintInteractionController* pic = [UIPrintInteractionController sharedPrintController];
NSData *imageData = [NSData dataWithData:UIImagePNGRepresentation(img)];
if (pic && [UIPrintInteractionController canPrintData:imageData])
{
pic.delegate = self;
UIPrintInfo* printInfo = [UIPrintInfo printInfo];
printInfo.outputType = UIPrintInfoOutputPhoto;
printInfo.jobName = @"PrintingImage";
printInfo.duplex = UIPrintInfoDuplexLongEdge;
pic.printInfo = printInfo;
pic.showsPageRange = YES;
pic.printingItem = imageData;
void (^completionHandler)(UIPrintInteractionController *,BOOL,NSError *) = ^(UIPrintInteractionController *printController,BOOL completed,NSError *error) {
if (!completed && error) {
NSLog(@"Failed! due to error in domain %@ with error code %u",error.domain,error.code);
}
};
[pic presentAnimated:YES completionHandler:completionHandler];
}
}
任何帮助都会很棒.
提前致谢 ！
解决方法
presentAnimated:completionHandler:Presents the iPhone printing user interface in a sheet that can be
animated to slide up from the bottom of the screen.
presentFromBarButtonItem:animated:completionHandler:Presents the iPad printing user interface in a popover view that can
be animated from a bar-button item.
presentFromRect:inView:animated:completionHandler:Presents the iPad printing user interface in a popover view that can
be animated from any area in a view.
您应该在相应的设备类型上使用正确的方法.
if([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPad) { [pic presentFromRect:self.view.frame inView:self.view animated:YES completionHandler:completionHandler]; } else { [pic presentAnimated:YES completionHandler:completionHandler]; }
您应该为弹出窗口演示使用适当的参数.
