Question

我有这些代码在Tools.m上打印QRCode：

#import <CoreImage/CoreImage.h>
...
+ (UIImage *)renderQRCodeFrom:(NSString *)source withImageViewFrameSize:(CGSize)imageViewFrameSize {

    NSString *qrString = source;
    NSData *stringData = [qrString dataUsingEncoding: NSUTF8StringEncoding];

    CIFilter *qrFilter = [CIFilter filterWithName:@"CIQRCodeGenerator"];
    [qrFilter setValue:stringData forKey:@"inputMessage"];
    [qrFilter setValue:@"H" forKey:@"inputCorrectionLevel"];

    CIImage *qrImage = qrFilter.outputImage;
    float scaleX = imageViewFrameSize.width / qrImage.extent.size.width;
    float scaleY = imageViewFrameSize.height / qrImage.extent.size.height;

    qrImage = [qrImage imageByApplyingTransform:CGAffineTransformMakeScale(scaleX, scaleY)];

    return [UIImage imageWithCIImage:qrImage scale:[UIScreen mainScreen].scale orientation:UIImageOrientationUp];
}

但是当我编译它时，它显示错误：

Undefined symbols for architecture arm64:
  "_OBJC_CLASS_$_CIFilter", referenced from:
      objc-class-ref in Tools.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

为什么会出现这种错误？我已正确包含CoreImage.h，据我所知，我无法在网络上找到类似的错误，这意味着此错误不常见。我可以通过CMD +点击CIFilter，它会导致CoreImage/CIFilter.h。

NS_CLASS_AVAILABLE(10_4, 5_0)
@interface CIFilter : NSObject <NSSecureCoding, NSCopying>
{
    void *_priv[8];
}
...

我的项目部署目标设置为iOS 8.0。我在这个项目中使用没有ARC的Obj C。

Answer 1

忘了这个问题。答案是不要忘记项目目标中的CoreImage 框架＆gt;一般＆gt;滚动到底部。

叹息。

symbol(s) not found for architecture armv7s (linker command failed with exit code 1)

CIFilter的未定义符号，即使我已包含CoreImage.h

1 个答案: