Question

我尝试将图像放入我的UIImageView中，称为imgBack 我在标题中将UIImageView定义为IBOutlet

IBOutlet UIImageView *imgBack;

在我的viewDidLoad函数中，我将contentMode设置为：

imgBack.contentMode = UIViewContentModeScaleAspectFit;

但在我将图片加载到imgBack之后：

imgBack.image = [UIImage imageWithContentsOfFile: imagePath];

它不会缩放以适合imageview

这是我加载到imgBack的图片： image i try to load

这就是视图中的样子：image in UIImageView

如您所见，图片不适合视图。有谁知道为什么？

Answer 1

如果更改ImageView contentMode不适合您，那么您可以尝试使用以下代码调整图像大小以适合图像视图

UIImage *originalImage = [UIImage imageWithContentsOfFile: imagePath];
imgBack.image = [self resizeImage: originalImage imageSize: imgBack.size];

并将此代码添加到ViewController

-(UIImage*)resizeImage:(UIImage *)image imageSize:(CGSize)size
    {
        UIGraphicsBeginImageContext(size);
        [image drawInRect:CGRectMake(0,0,size.width,size.height)];
        UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();
        //here is the scaled image which has been changed to the size specified
        UIGraphicsEndImageContext();
        return newImage;

    }

Answer 2

首先将图片附加到UIImageView，然后更改content mode

imgBack.image = [UIImage imageWithContentsOfFile: imagePath];
imgBack.contentMode = UIViewContentModeScaleAspectFill;
imgBack.clipsToBounds = YES;

Answer 3

below are the mode try and check
UIViewContentModeScaleToFill,
    UIViewContentModeScaleAspectFit,      // contents scaled to fit with fixed aspect. remainder is transparent
    UIViewContentModeScaleAspectFill,     // contents scaled to fill with fixed aspect. some portion of content may be clipped.
    UIViewContentModeRedraw,              // redraw on bounds change (calls -setNeedsDisplay)
    UIViewContentModeCenter,              // contents remain same size. positioned adjusted.
    UIViewContentModeTop,
    UIViewContentModeBottom,
    UIViewContentModeLeft,
    UIViewContentModeRight,
    UIViewContentModeTopLeft,
    UIViewContentModeTopRight,
    UIViewContentModeBottomLeft,
    UIViewContentModeBottomRight,

UIImageView中的UIViewContentModeScaleAspectFit无法正常工作

3 个答案: