ios - 如何修复与 sizeWithFont 和 drawAtPoint 相关的折旧警告？

Question

我正在尝试将为 iOS 7 之前版本编写的示例代码合并到我的演示项目中。我得到一些与 drawAtPoint 和 sizeWithFont 相关的折旧方法。我已经阅读了一堆具有相同问题的 SO 条目，但它们都与标签和 tableview 单元格等相关。我正在尝试将 pdf 绘制到我的 View 中，但不知何故我无法想出正确的代码集用新方法。我真的很感激任何帮助的人。这是我正在使用的类(class)的一部分:

UIFont* studentNameFont = [UIFont boldSystemFontOfSize:17];
UIFont* classFont = [UIFont systemFontOfSize:15];

CGFloat currentPageY = 0;

for (NSDictionary* student in students)
{
    UIGraphicsBeginPDFPageWithInfo(CGRectMake(0, 0, kDefaultPageWidth, kDefaultPageHeight), nil);
    currentPageY = kMargin;

    NSString* name = [NSString stringWithFormat:@"%@ %@",
                      [student objectForKey:@"FirstName"],
                      [student objectForKey:@"LastName"]];

    // depreciated method
    CGSize size = [name sizeWithFont:studentNameFont forWidth:maxWidth lineBreakMode:NSLineBreakByWordWrapping];

    //depreciated method
    [name drawAtPoint:CGPointMake(kMargin, currentPageY) forWidth:maxWidth withFont:studentNameFont lineBreakMode:NSLineBreakByWordWrapping];
    currentPageY += size.height;

    CGContextSetStrokeColorWithColor(context, [[UIColor blueColor] CGColor]);
    CGContextMoveToPoint(context, kMargin, currentPageY);
    CGContextAddLineToPoint(context, kDefaultPageWidth - kMargin, currentPageY);
    CGContextStrokePath(context);

    NSArray* classes = [student objectForKey:@"Classes"];
    for(NSDictionary* class in classes)
    {
        NSString* className = [class objectForKey:@"Name"];
        NSString* grade = [class objectForKey:@"Grade"];

    //depreciated method
        size = [className sizeWithFont:classFont constrainedToSize:CGSizeMake(classNameMaxWidth, MAXFLOAT) lineBreakMode:NSLineBreakByWordWrapping];

        // if the current text would render beyond the bounds of the page,
        // start a new page and render it there instead
        if (size.height + currentPageY > maxHeight) {
            // create a new page and reset the current page's Y value
            UIGraphicsBeginPDFPageWithInfo(CGRectMake(0, 0, kDefaultPageWidth, kDefaultPageHeight), nil);
            currentPageY = kMargin;
        }
        //depreciated method
        [className drawInRect:CGRectMake(kMargin, currentPageY, classNameMaxWidth, maxHeight) withFont:classFont lineBreakMode:NSLineBreakByWordWrapping alignment:NSTextAlignmentLeft];

        //depreciated method
        [grade drawInRect:CGRectMake(kMargin + classNameMaxWidth + kColumnMargin, currentPageY, gradeMaxWidth, maxHeight) withFont:classFont lineBreakMode:NSLineBreakByWordWrapping alignment:NSTextAlignmentLeft];

        currentPageY += size.height;

    }

Answer 1

你可以用这个方法

[className sizeWithAttributes:@{NSFontAttributeName:classFont}];