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OK, so I'm parsing through the PDF content stream, discovered that the TJ callback produces an array of strings, so I grab it and start iterating through it to get the string values like so:

static void Op_TJ(CGPDFScannerRef s, void *info)
{
    CGPDFArrayRef array;
    bool success = CGPDFScannerPopArray(s, &array);
    if(success) {
        NSMutableString *actualString = [[NSMutableString alloc] init];
        NSLog(@"array count:%zu",CGPDFArrayGetCount(array));
        for(size_t i = 0; i < CGPDFArrayGetCount(array); i++) {
            CGPDFStringRef string;
            CGPDFArrayGetString(array, i, &string);
            NSString *stringData = (NSString *)CGPDFStringCopyTextString(string);
            [actualString appendString:stringData];
            NSLog(@"string Data:%@",stringData);
        }
        NSLog(@"actual string:%@",actualString);
    }
}

Only problem is, this is my output:

2013-01-11 12:39:49.895 WinPCS Mobile[1617:c07] began text object
2013-01-11 12:39:49.895 WinPCS Mobile[1617:c07] array count:7
2013-01-11 12:39:49.896 WinPCS Mobile[1617:c07] string Data:In
2013-01-11 12:39:49.896 WinPCS Mobile[1617:c07] string Data:In
2013-01-11 12:39:49.896 WinPCS Mobile[1617:c07] string Data:it
2013-01-11 12:39:49.896 WinPCS Mobile[1617:c07] string Data:it
2013-01-11 12:39:49.897 WinPCS Mobile[1617:c07] string Data:ia
2013-01-11 12:39:49.897 WinPCS Mobile[1617:c07] string Data:ia
2013-01-11 12:39:49.897 WinPCS Mobile[1617:c07] string Data:ls
2013-01-11 12:39:49.898 WinPCS Mobile[1617:c07] actual string:InInititiaials
2013-01-11 12:39:49.898 WinPCS Mobile[1617:c07] ended text object

I've resorted to exiting the for loop if i equals a number divisible by 2, but this is extremely sloppy and seems inefficient, so I'm wondering if anyone has a solution or any idea what the problem might be... I've tried multiple PDF files with the same results.

My simple quick fix was to change the for loop from this:

for(int i = 0; i < CGPDFArrayGetCount(array); i++)

to this:

for(int i = 0; i < CGPDFArrayGetCount(array); i+=2)
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1 回答 1

2

CGPDFArrayGetString被定义为返回一个 BOOL，如果在指定索引处存在 PDF 字符串，则返回 true，否则返回 false。

您没有检查返回值！

我的猜测是每两次您没有 PDF 字符串（并且函数返回 false）。

在这些情况下，该函数不会覆盖与前一个循环保持相同的字符串变量。

只是猜测。。

于 2013-01-11T19:14:13.037 回答