IOS makes a. 9 stretch chart similar to Android

Uiview's contentstretch (view extension and contraction)

There is not much information about contentstretch on the Internet. It took some time to study the official documents.

Make a record:

When 1.png is larger than imagev, 1.png is reduced.

When 1.png is smaller than imagev, 1.png is enlarged.

Zoom in:

Imagev. Image = [uiimage imagenamed: @ "1.png"];

[Imagev setcontentstretch: cgrectmake (150.0/300.0, 75.0/150.0, 10.0/300.0, 10.0/150.0)];

The size of 1.png is 210.0x126.0;

The frame of imagev is (9,117,300,150 );

150.0/300.0 indicates that the first 150 pixels are not stretched on the X axis.

75.0/150.0 indicates that on the Y axis, the first 75 pixels are not stretched.

10.0/x axis with 10 entries (151-160)walking, directly to 1.png filled with imagev.

10.0/150.0yaxis on the top of the 10 (76-85) feed stretch, straight to 1.png full imagev.

1. PNG (source image, which is readily available ....)

After stretching

Zoom out:

Imagev. Image = [uiimage imagenamed: @ "j.png"];

[Imagev setcontentstretch: cgrectmake (50.0/imagev. Frame. Size. Width,

50.0/imagev. Frame. Size. height,

(Imagev. Frame. Size. Width-100.0)/imagev. Frame. Size. Width,

(Imagev. Frame. Size. Height-100.0)/imagev. Frame. Size. Height)];

Source image

300x240 after compression

Imagev size: 200x150
From: http://hi.baidu.com/jt_one/blog/item/937b6e81932a58c3bc3e1e9b.html