Question

我正在尝试解决一个问题，以确定要打印到PDF以填充一个页面然后创建新页面的文本数量。

这是我到目前为止所做的：

        CGSize maximumSize = CGSizeMake(stringSize.width, 999999999);
        CGSize expectedSize = [cleanText sizeWithFont:font constrainedToSize:maximumSize lineBreakMode:NSLineBreakByWordWrapping];
        NSInteger totalPages = ceil(expectedSize.height / stringSize.height);
        NSInteger linesWithoutClipping = floor(stringSize.height / font.lineHeight);
        CGFloat optimalPageHeight = linesWithoutClipping * font.lineHeight;
        NSLog(@"optimalPageHeight = %f", optimalPageHeight);

        //CHECK IF THE HEIGHT IS BIGGER THAN
        if(renderingRect.size.height > rect.size.height){
            NSLog(@"LETS DO THIS ON TWO PAGES");
            [cleanText drawInRect:rect withAttributes:dictionary];
            onePageofText = cleanText;
            done = NO;
        } else {
            onePageofText = cleanText;
            done = YES;
        }
        //Draw some text for the page.
        [self drawText:onePageofText];
    } 
    while (!done);

    // Close the PDF context and write the contents out.
    UIGraphicsEndPDFContext();

我想尝试逐句循环cleanText并在输出之前检查每个句子，看它是否仍适合页面。有一种直截了当的方法吗？

Answer 1

您是否尝试过使用-[NSString componentsSeparatedByString:]？

例如：

NSArray *sentences = [cleanText componentsSeparatedByString:@". "];

唯一的规定是cleanText必须是NSString。

请参阅此处的文档： https://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Classes/NSString_Class/

Answer 2

这将为您提供更精确的输出（包括“！”和“？”）：

    [mutstri enumerateSubstringsInRange:NSMakeRange(0, [mutstri length])
                                options:NSStringEnumerationBySentences
                             usingBlock:^(NSString *substring, NSRange substringRange, NSRange enclosingRange, BOOL *stop){

                                 NSLog(@"%@", substring);

                             }];

如何制作一系列句子？

2 个答案: