UIImage大小的变化

Question

我正在尝试创建一个从Web数据库中获取问题的测验应用。有些问题有图片，有些则没有。我希望图像占据屏幕的所有空闲区域（不改变方面无线电）。我无法确定图片的位置，因为问题文本的长度变化很大。 当我点击“开始游戏”时，我得到的第一个问题就像我希望它看起来一样（图片1），但是稍后我的视图似乎重新绘制了自己，图像将问题文本向下推。 （图2）

这是我用来更新视图的功能：

- (void) loadCurrentQuestion {
    [loadDialog dismissWithClickedButtonIndex:-1 animated:NO];
    self.navigationController.navigationBar.topItem.title = [[[@"Spurning " stringByAppendingString:[NSString stringWithFormat: @"%d", nr]] stringByAppendingString:@"/"] stringByAppendingString:[NSString stringWithFormat: @"%d", numOfQuestions]];
    tapToContinue = NO;
    //question.text = currQuestion.question;
    question.text = @"Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.";


    //[image setNeedsDisplay];
    //[question setNeedsDisplay];


    image.contentMode = UIViewContentModeScaleAspectFit;

    [c1 setTitle: [currQuestion getAnswer:1] forState:UIControlStateNormal];


    c1.titleLabel.numberOfLines = 3;
    c2.titleLabel.numberOfLines = 3;
    c3.titleLabel.numberOfLines = 3;
    c4.titleLabel.numberOfLines = 3;

    [c2 setTitle: [currQuestion getAnswer:2] forState:UIControlStateNormal];
    [c3 setTitle: [currQuestion getAnswer:3] forState:UIControlStateNormal];
    [c4 setTitle: [currQuestion getAnswer:4] forState:UIControlStateNormal];
    [c1 setEnabled:YES];
    [c2 setEnabled:YES];
    [c3 setEnabled:YES];
    [c4 setEnabled:YES];
    [c1 setBackgroundColor:[UIColor whiteColor]];
    [c2 setBackgroundColor:[UIColor whiteColor]];
    [c3 setBackgroundColor:[UIColor whiteColor]];
    [c4 setBackgroundColor:[UIColor whiteColor]];

    if (!(currQuestion.image == (id)[NSNull null]) ) {
        if ([currQuestion.image length] > 1000)
            image.image = [UIImage imageWithData: [[ImageProcessing alloc] stringToImage: currQuestion.image]];
        else
            image.image = [UIImage imageNamed:@"question_no_image.jpg"];
    } 
    else
        image.image = [UIImage imageNamed:@"question_no_image.jpg"];

    //[loadDialog dismissWithClickedButtonIndex:-1 animated:NO];
}

我很确定我在Storyboard中使用了正确的约束，因为正确的外观出现在开头。 我该如何解决这个问题？

Answer 1

 To the below method send your image and the size for the image you need this will not spoil aspect ration and fix the image size in that view

+(UIImage *)croppIngimageByImageName:(UIImage *)imageToCrop toRect:(CGRect)rect forImageViewRect:(CGSize)imageVwRect{

//  UIImage *tempImage;
// tempImage=[self scaleImage:imageToCrop toSize:imageVwRect];

CGImageRef imageRef = CGImageCreateWithImageInRect([imageToCrop CGImage], rect);
UIImage *cropped = [UIImage imageWithCGImage:imageRef];
CGImageRelease(imageRef);

//  cropped=[self scaleImage:cropped toSize:rect.size];
return cropped;
}