iOS：所有设备的图片自动调整大小

Question

我正在尝试使用自动布局和尺寸类来调整图像的大小，但我似乎无法为iPhone 6+调整图像的大小，与iPhone 4或5相比，该图像很小。这是我第一次使用自动布局，因此我很友善对如何做感到困惑。

Answer 1

For all Iphone ,size classes is compact width and Regular height

so select this and after that add 4 constraint

1. Leading
2. Trailing
3. Top
4. Bottom to your super view

Answer 2

You can replace childView to your imageView....

childView.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin;

// vertical
childView.autoresizingMask = UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleBottomMargin;

// both
childView.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleBottomMargin;

Answer 3

have you tried using the previewer in xCode, its part of the assistant editor and will probably help.

There is a guide here: http://www.dummies.com/how-to/content/how-to-autosize-an-image-with-auto-layout-for-your.html

Answer 4

Add "proportional width" and "proportional height" to superview and make "center horizontal" and "center vertical" or anywhere you want to position. And once check the content mode of image to "ScaleAspectFit" or anything else which makes the image bigger. If your image is of small size then it will show smaller on content mode "Center". Or use big images for all size devices. Make sure you are using @2x and @3x images.

Answer 5

禁用Size类，然后通过按Control +拖动imageview将约束添加到superview并将其添加到约束。Leading Trailing Top Bottom

Answer 6

Just put constraints on image view, to 0 from all the edges. Don't add any more constraint. It will stretch and shrink according to device that you use. Regards