Question

当我尝试运行我的旋转方法时，我收到以下错误：

<Error>: CGContextRotateCTM: invalid context 0x0. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.

旋转方法：

＆＃13;

UIImage* rotate(UIImage* src, double degrees) {
    UIGraphicsBeginImageContext(src.size);
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextRotateCTM (context, radians(degrees));
    [src drawAtPoint:CGPointMake(0, 0)];
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return image;
}

＆＃13;

你知道我做错了什么吗？

Answer 1

图片为零

OR

它的大小为零。 =＆GT;空图像

iOS - CGContextRotateCTM上的上下文无效

1 个答案: