iOS Swift - UIImageView无法设置ContentMode

Question

我正在使用CIFilter向图像添加滤镜。过滤图像后得到的图像大小为：CGRectMake(10, 10, 70, 70)。我无法将结果图像内容模式设置为ScaleAspectFill。代码如下：

    filter2image.frame = CGRectMake(90, 10, 70, 70)
    let filter2data = CIFilter(name: "CIPhotoEffectChrome")
    filter2data.setValue(CIImage(image: imageView.image), forKey: kCIInputImageKey)
    self.filter2image.image = UIImage(CIImage: filter2data.outputImage)
    filter2image.contentMode = UIViewContentMode.ScaleAspectFill

Answer 1

尝试在设置contentMode后更改帧。如下所示：

let filter2data = CIFilter(name: "CIPhotoEffectChrome")
filter2data.setValue(CIImage(image: imageView.image), forKey: kCIInputImageKey)
self.filter2image.image = UIImage(CIImage: filter2data.outputImage)
filter2image.contentMode = UIViewContentMode.ScaleAspectFill
filter2image.frame = CGRectMake(90, 10, 70, 70)