iOS method classes: The use of cgaffinetransform is probably

The Cgaffinetransform class in the Coregraphics framework can be used to set the transform properties of the UIView, control the zoom, rotate, and pan operations of the view:

Also known as the radiation transformation matrix, can refer to linear algebra matrix implementation mode 0.0

The Cgaffinetransform official documentation is attached here:

Https://developer.apple.com/library/ios/documentation/GraphicsImaging/Reference/CGAffineTransform/index.html

Generally speaking, this class contains 3 different types, respectively, using the following 3 methods to create a value;

1.CGAffineTransformMakeTranslation (cgfloat tx, cgfloat ty) (pan: Set translation amount)

2.CGAffineTransformMakeScale (cgfloat sx, cgfloat sy) (Scale: Set scale) The effect of the view rushing and indenting the frequency screen is achieved only by setting the zoom scale.

3.CGAffineTransformMakeRotation (cgfloat angle) (rotation: Set rotation angle)

All of the above 3 are for the initial reference of the center point for the original view, and you can restore the set amount after the operation is finished:

view. Transform =cgaffinetransformidentity;

In addition, the existing transform can be further treated by means of cgaffinetransformtranslate and other methods.

iOS method classes: The use of cgaffinetransform is probably