TextAnimation

Select a UIText actor, add "UIEffectTextAnimation" component:

TextAnimation Component

Property:	Function:
Selector	Selector defines the method to select characters in text.
Properties	Properties defines which property will affect and how it affect.
Execute Order	See Common Effect
Basically we use Selector to select range of characters in text, and use Properties to change character's property, then use a animation controller to Play Animation.

Get example from This Project.

Selector

Selector can collect information about which characters are selected, and 0 to 1 interpolation value from start to end, then provide these informations to Properties.
There are 3 types of Selector: Range, Random, RichTextTag.

Range selector defines start and end range of characters in UIText, and provide 0 to 1 value(for interpolation) from start to end.

Property:	Function:
Start	Start character position from 0 to 1, 0 is first character of text, 1 is last one.
End	End character position from 0 to 1, 0 is first character of text, 1 is last one.
Offset	0 means Properties will have no effect, 1 means Properties have full effect, and middle value is interplation. We can set this "offset" property to make animation.
Range	Selector can provide 0 to 1 value from start to end, but sometime Properties effect may look too smooth, so lower this value can let Properties effect more sharp.
Flip Direction	Selector can provide 0 to 1 value from start to end when this value is false, if it is true then 1 to 0 from start to end.

Random selector will select characters randomly, and generate random value from 0 to 1 for interpolation.

Property:	Function:
Seed	Random seed.
Start	Start character position from 0 to 1, 0 is first character of text, 1 is last one.
End	End character position from 0 to 1, 0 is first character of text, 1 is last one.
Offset	0 means Properties will have no effect, 1 means Properties have full effect, and middle value is interplation. We can set this "offset" property to make animation.

RichTextTag selector can select characters by rich-text custom-tag, and provide 0 to 1 value(for interpolation) from start to end.

Property:	Function:
Range	Like the property in Range selector. Lower this value can let Properties effect more sharp.
Tag Name	Custom tag name
Flip Direction	Like the property in Range selector, flip 0-1 to 1-0.
Offset	0 means Properties will have no effect, 1 means Properties have full effect, and middle value is interplation. We can set this "offset" property to make animation.

Properties

Properties can use the information that passed from Selector, and apply property change to characters.
There are many types of Properties: Alpha, Color, Position, Rotation, Scale, Position Random, Position Wave... The name is what it functional for.

eg.
Alpha can change transparency of characters.

Property:	Function:
Alpha	Target alpha value, 0-1 range.
Ease Type	Animation type, same as LTween ease.
Ease Curve	Only valid if easeType = CurveFloat. Use CurveFloat to control the animation.

ColorRandom can generate random color.

Property:	Function:
Seed	Random seed
Min	Random min
Max	Random max
Use HSV	Conver color to HSV(Hue, Saturate, Value) and interpolate, then convert the result back. Interpolate two colors in HSV may look better.

PositionWave can use a sin function to generate wave effect for characters.

Property:	Function:
Position	Max position value for sin wave. Sin function generate values from -1 to 1, so the result will be from -position to position.
Frequency	Higher frequency will generate smaller wavelength.
Speed	Move speed of the wave.
Flip Direction	Flip move speed direction of the wave.

We can use multiple properties to combine our specific effects, the effects will calculate from top to bottom:

PlayAnimation

We can use build-in LGUIPlayTween component to control our animation. The key is call function SetSelectorOffset on UIEffectTextAnimation component.