从两个视图绘制 PDF

Question

我有第一个视图firstView，还绘制了第二个视图secondView，并将其作为子视图添加到firstView。 我也有从firstView PDF 文件创建的方法：

-(void)createPDFfromUIView:(UIView*)firstView
{

    NSMutableData *pdfData = [NSMutableData data];

    UIGraphicsBeginPDFContextToData(pdfData, self.view.bounds, nil);
    UIGraphicsBeginPDFPage();
    CGContextRef pdfContext = UIGraphicsGetCurrentContext();


    [firstView.layer drawInContext:pdfContext];

    UIGraphicsEndPDFContext();

    NSArray* documentDirectories = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES);

    NSString* documentDirectory = [documentDirectories objectAtIndex:0];
    NSString* documentDirectoryFilename = [documentDirectory stringByAppendingPathComponent:@"resolution.pdf"];

    [pdfData writeToFile:documentDirectoryFilename atomically:YES];
    NSLog(@"documentDirectoryFileName: %@",documentDirectoryFilename);
}

如何从这两个视图中绘制一个 PDF，因此 PDF 文件必须在一页包含 firstView 和 secondView

已添加

在 loadView 方法中的 ViewController 中

        AWFirstView *firstView = [[AWFirstView alloc] init];
    self.view = firstView;

    self.secondView = [[AWSecondtView alloc] initWithFrame:CGRectMake(0, 50, 300., 300.)];
    [self.secondView setBackgroundColor:[UIColor clearColor]];

     self.createPDFButton = [UIButton buttonWithType:UIButtonTypeCustom];
    self.createPDFButton.frame =CGRectMake(0, 0, 88., 50.);
    [self.createPDFButton setBackgroundColor:[UIColor whiteColor]];
    [self.createPDFButton addTarget:self action:@selector(createPDF) forControlEvents:UIControlEventTouchUpInside];
    [self updateView];
    [self.view addSubview:self.drawWindow];
    [self.view addSubview:self.createPDFButton];

在 updateView 中是这样的：

    -(void)updateView
{
    if(![self isViewLoaded])
        return;

    [[AWServices services].uiContext updateObjectInCurrentContext:&_resolution];


    AWFirstView *view = (AWFirstView *)self.view;
    view.post = _resolution.contact.officialPersonPost;
    view.name = _resolution.contact.officialPersonFullname;

    [view.superview setNeedsDisplay];

在

-(void)createPDF{
[self createPDFfromUIView:self.view];

}

Answer 1

嗯，我加了

[self.secondView.layer drawInContext:pdfContext];

在-(void)createPDFfromUIView 中，它起作用了。但这是正确的解决方案吗？

Answer 2

试试这个：

UIGraphicsBeginPDFContextToData(pdfData, firstView.bounds, nil);
UIGraphicsBeginPDFPage();
CGContextRef pdfContext = UIGraphicsGetCurrentContext();

[firstView.layer drawInContext:pdfContext];

请注意，我现在将drawInContext: 发送到firstView，而不是像您之前那样发送myView。如果将firstView 传递给方法，那么这应该会给出预期的结果。

编辑：您没有将secondView 添加为子视图；这样做（第三行）：

self.secondView = [[AWSecondtView alloc] initWithFrame:CGRectMake(0, 50, 300., 300.)];
[self.secondView setBackgroundColor:[UIColor clearColor]];
[self.firstView addSubview:self.secondView];

此外，您对self.view 的分配看起来不太好：

self.view = firstView;

你要么做：

[self.view addSubview:self.firstView];

或者您在视图控制器中定义 loadView 并将其分配给 self.view。