使用reportLab向页面添加页眉和页脚

Question

我试图在一个页面上同时包含页眉和页脚。我引用了A multiline(paragraph) footer and header in reportlab并使用了Jochen和NateB80所述的方法。但只生成页眉而不生成页脚

def header(canvas, doc, content):
    canvas.saveState()
    w, h = content.wrap(doc.width, doc.topMargin)
    content.drawOn(canvas, doc.leftMargin, doc.height + doc.topMargin - h)
    canvas.restoreState()


def footer(canvas, doc, content):
    canvas.saveState()
    w, h = content.wrap(doc.width, doc.bottomMargin)
    content.drawOn(canvas, doc.leftMargin, h)
    canvas.restoreState()

styles = getSampleStyleSheet()

PAGESIZE = pagesizes.portrait(pagesizes.A4)
# PAGESIZE = letter
pdf = SimpleDocTemplate(filename, pagesize=PAGESIZE, leftMargin=2.2*cm, rightMargin=2.2*cm,
        topMargin=1.5*cm,bottomMargin=2.5*cm)
frameh = Frame(pdf.leftMargin, pdf.bottomMargin, pdf.width, pdf.height - 2 * cm, id='normal')
header_content = Paragraph("This is a header. testing testing testing  ", styles['Normal'])
templateh = PageTemplate(id='test', frames=frameh, onPage=partial(header, content=header_content))
pdf.addPageTemplates([templateh])

framef = Frame(pdf.leftMargin, pdf.bottomMargin, pdf.width, pdf.height, id='normal')
footer_content = Paragraph("This is  footer.  It goes on every page.  ", styles['Normal'])
templatef = PageTemplate(id='test', frames=framef, onPage=partial(footer, content=footer_content))
pdf.addPageTemplates([templatef])

我也尝试了下面的方法，但是仍然没有生成页脚

 pdf.addPageTemplates([
                      PageTemplate(id='footer', frames=[frameh, framef], onPage=partial(header, content=header_content)),
                      ])

Answer 1

您需要将header和footer组合成一个函数，并将其放入一个PageTemplate

from reportlab.lib.styles import getSampleStyleSheet
from reportlab.lib.units import cm
from reportlab.platypus import SimpleDocTemplate, PageTemplate
from reportlab.platypus.frames import Frame
from reportlab.lib import pagesizes
from reportlab.platypus.paragraph import Paragraph
from functools import partial

def header(canvas, doc, content):
    canvas.saveState()
    w, h = content.wrap(doc.width, doc.topMargin)
    content.drawOn(canvas, doc.leftMargin, doc.height + doc.bottomMargin + doc.topMargin - h)
    canvas.restoreState()

def footer(canvas, doc, content):
    canvas.saveState()
    w, h = content.wrap(doc.width, doc.bottomMargin)
    content.drawOn(canvas, doc.leftMargin, h)
    canvas.restoreState()

def header_and_footer(canvas, doc, header_content, footer_content):
    header(canvas, doc, header_content)
    footer(canvas, doc, footer_content)

styles = getSampleStyleSheet()

filename = "out.pdf"

PAGESIZE = pagesizes.portrait(pagesizes.A4)

pdf = SimpleDocTemplate(filename, pagesize=PAGESIZE, 
        leftMargin = 2.2 * cm, 
        rightMargin = 2.2 * cm,
        topMargin = 1.5 * cm, 
        bottomMargin = 2.5 * cm)

frame = Frame(pdf.leftMargin, pdf.bottomMargin, pdf.width, pdf.height, id='normal')

header_content = Paragraph("This is a header. testing testing testing  ", styles['Normal'])
footer_content = Paragraph("This is a footer. It goes on every page.  ", styles['Normal'])

template = PageTemplate(id='test', frames=frame, onPage=partial(header_and_footer, header_content=header_content, footer_content=footer_content))

pdf.addPageTemplates([template])

pdf.build([Paragraph("This is content")])