Question

因此我选择用于设置屏幕的故事板高度为667（iPhone 6高度）。但是，如果我要使用4s模拟器，我只能看到667中的480个（要查看额外的187个像素，我设置了一个scrollview）。考虑到这一点，我是否能够创建代码来截取整个667像素的故事板，即使我可能使用最大高度为480且永远无法查看整个667像素高度的4s模拟器？

Answer 1

要完成此屏幕截图，我拍摄了整个tableview的屏幕截图，将其转换为PDF，以便我可以打印它。希望这会帮助你。

首先在我的.h文件中，我使用了UIPrintInteractionControllerDelegate，所以我最终可以打印我的截图。

然后在接口后我的.m文件中声明了一个存储pdf数据的变量。

@property (nonatomic, strong) NSMutableData *pdfData;

同样在我的.m文件中，我创建了一个按钮，可以在IB中打印并将其连接到printThis方法。

- (IBAction)printThis:(id)sender
{
[self createPDF];  //Will show you this in a second

UIPrintInteractionController *pic = [UIPrintInteractionController sharedPrintController];
pic.delegate = self;
UIPrintInfo *printInfo = [UIPrintInfo printInfo];
printInfo.outputType = UIPrintInfoOutputGeneral;
printInfo.jobName = [NSString stringWithFormat:@"ELEMENTS"];
printInfo.duplex = UIPrintInfoDuplexLongEdge;
pic.printInfo = printInfo;
pic.showsPageRange = YES;
pic.printingItem = _pdfData;

void (^completionHandler)(UIPrintInteractionController *, BOOL, NSError *) = ^(UIPrintInteractionController *printController, BOOL completed, NSError *error)
{
    if (!completed && error)
    {
        NSLog(@"Printing could not complete because of error: %@", error);
    }
};

// This is for iPad
[pic presentFromBarButtonItem:self.printButton animated:YES completionHandler:completionHandler];

// This is for iPhone/iPod
[pic presentAnimated:YES completionHandler:completionHandler];

//You can use an if statement to pick which device you are on, I only used the phone for this app
}

返回createPDF方法。这对你最有帮助。

- (void)createPDF
{
_pdfData = [NSMutableData data];

UITableView *tempView = [[UITableView alloc] init]; //I printed a tableview, you can print your scroll view
tempView = _elementTableView; //Put your scroll view in the temp view 
_headerView.hidden = YES;  //I didn't want to print my header but you won't have one

CGRect priorBounds = tempView.bounds; //getting bounds of your scrollview 
CGSize fittedSize = [tempView sizeThatFits:CGSizeMake(priorBounds.size.width, HUGE_VALF)];
tempView.bounds = CGRectMake(0, 0, fittedSize.width, fittedSize.height);

CGRect pdfPageBounds = CGRectMake(0, 10, 612, 792);  //This is the size of a page of paper so I could print to regular paper

UIGraphicsBeginPDFContextToData(_pdfData, pdfPageBounds, nil);
{
    for (CGFloat pageOriginY = 0; pageOriginY < fittedSize.height; pageOriginY += pdfPageBounds.size.height)  //This lets me print multiple pages if it goes over
    {
        UIGraphicsBeginPDFPageWithInfo(pdfPageBounds, nil);
        CGContextSaveGState(UIGraphicsGetCurrentContext());
        {
            CGContextTranslateCTM(UIGraphicsGetCurrentContext(), 0, -pageOriginY);
            [tempView.layer renderInContext:UIGraphicsGetCurrentContext()];
        }CGContextRestoreGState(UIGraphicsGetCurrentContext());
    }
}UIGraphicsEndPDFContext();
tempView.bounds = priorBounds;
}

所以现在我有一个按钮，可以屏幕拍摄整个桌子视图，在你的情况下你的滚动视图，把它变成一个pdf并打印，如果该设备能够进行空气打印。检查我在viewDidLoad方法中使用过....

if ([UIPrintInteractionController isPrintingAvailable])
{
    _printButton.enabled = YES;
    _printButton.width = 44.0f;
}
else
{
    _printButton.enabled = NO;
    _printButton.width = 0.0f;
}

如果您无法打印，这只会关闭按钮。我希望这能够帮到你。如果您有任何疑问，请告诉我。

屏幕截图整个故事板，即使模拟器没有实际看到整个板？

1 个答案: