Ios 在 ios 12.4.2 而非 12.0.1 上崩溃 "could not execute support code to read Objective-C"

Ios crash "could not execute support code to read Objective-C" on ios 12.4.2 not on 12.0.1

此方法returns一个字符串的二维码图片。它在 Ios 12.0.1 (iphone SE) 上正常工作,但在 12.4.2 (iphone 6) 上崩溃。当我尝试将结果 UIImage 分配给 UIImageView 时,方法崩溃,结果 UIImage 不是零。

-(UIImage*)get_QR_image :(NSString*)qrString :(UIColor*)ForeGroundCol :(UIColor*)BackGroundCol{

    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 = 320;
    float scaleY = 320;


    CIColor *iForegroundColor = [CIColor colorWithCGColor:[ForeGroundCol CGColor]];
    CIColor *iBackgroundColor = [CIColor colorWithCGColor:[BackGroundCol CGColor]];

    CIFilter * filterColor = [CIFilter filterWithName:@"CIFalseColor" keysAndValues:@"inputImage", qrImage, @"inputColor0", iForegroundColor, @"inputColor1", iBackgroundColor, nil];

    CIImage *filtered_image = [filterColor valueForKey:@"outputImage"];

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

    UIImage *result_image = [UIImage imageWithCIImage:filtered_image
                                                 scale:[UIScreen mainScreen].scale
                                           orientation:UIImageOrientationUp];


    return result_image;
}

崩溃涉及的行是:

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

它生成此日志:

warning: could not execute support code to read Objective-C class data in the process. This may reduce the quality of type information available.

我的方法中有些东西只适用于 12.0.1?或者可能出了什么问题?我如何才能调查更多以解决该崩溃问题?

编辑

红色的我有:

MyQrCodeImageViewBig.image=qrimage;

留言:

Thread 1: EXC_BREAKPOINT (code=1, subcode=0x1a83e146c)

我看到 [UIImage imageWithCIImage:] 初始化程序导致了很多问题。主要问题是 CIImage 实际上不包含任何位图数据。它需要先由 CIContext 渲染。因此,您分配 UIImage 的目标需要 知道 它由仍然需要渲染的 CIImage 支持。通常 UIImageView 处理得很好,但我不会太相信它。

你可以做的是将图像自己渲染成位图 (CGImage) 并用它初始化 UIImage。你需要一个 CIContext ,我建议你在这个方法之外的某个地方创建一次 once 并在每次需要渲染图像时重新使用它(它是一个昂贵的对象) :

self.context = [CIContext context];

然后在您的方法中,您渲染图像如下:

CGImageRef cgImage = [self.context createCGImage:filtered_image fromRect:[filtered_image extent]];
UIImage* result_image = [UIImage imageWithCGImage:cgImage];