/ Animations

A skeleton screen framework based on native for iO

A skeleton screen framework based on native for iO


The origin version of TABAnimated is the dynamic effect of the skeleton screen of the jianshu web page. I have explored the template mode in v1.9, but the repetitive workload is not conducive to rapid construction. Moreover, the existence of the two modes is unreasonable, so this setting is deleted in v2.1, but the appearance of the template mode to delete is not unproductive, but instead brings a more reasonable implementation scheme and a more convenient construction method.


Implementation Principle

TABAnimated requires a control view to make the switch animation. All subViews under this control view will be added to the animation queue.

TABAnimated creates TABCompentLayer by controlling the position of the subViews of the view and related information.
Normal control view with a TABLayer
Table view, each cell has a TABLayer
TABLayer is responsible for managing and displaying all TABCompentLayer.

When using constraints for layout, if the constraints are insufficient and there is no data, the location information of subViews will not be reflected, and TABAnimated will pre-populate the data.


  • Rapid integration
  • Zero coupling, easy to wrap its animation logic into the base library
  • High performance with minimal memory loss
  • Chained syntax, fast and easy to read
  • Fully customizable to fit 99.99% view

Evolution Process

Can't see clearly, you can zoom in


Briefly explain:

The first picture: the original table component, the display situation when there is data

The second picture: is the animation group mapped after the table component starts the animation. I believe you can see that the effect is not very beautiful.

The third picture: for this unsightly animation group, through the callback, pre-processing, the following description


Dynamic Card View Bin Animation
Dynamic Card-View Bin-Animation
Shimmer Animation Segment View Drop Animation
Shimmer-Animation Segment-View Drop-Animation


Using CocoaPods

Pod 'TABAnimated'

Manual Import

Drag the TABAnimated folder into the project.


You only need four steps

  1. Initialize TABAimated in didFinishLaunchingWithOptions

There are other global properties, which are presented below in a table.

// init `TABAnimated`, and set the properties you need.
[[TABAnimated sharedAnimated] initWithOnlySkeleton];
// open log
[TABAnimated sharedAnimated].openLog = YES;
  1. Control view initialization tabAnimated

Ordinary view:

self.mainView.tabAnimated = TABViewAnimated.new;
self.mainView.tabAnimated.categoryBlock = ^(UIView * _Nonnull view) {

Table component:

_collectionView.tabAnimated =
[TABCollectionAnimated animatedWithCellClass:[NewsCollectionViewCell class]
                                    cellSize:[NewsCollectionViewCell cellSize]];
_collectionView.tabAnimated.categoryBlock = ^(UIView * _Nonnull view) {
  1. Turn on the animation
[self.collectionView tab_startAnimation];
  1. Turn off the animation
[self.collectionView tab_endAnimation];

UIView corresponds to TABViewAnimated

UITableView corresponds to TABTableAnimated

UICollectionView corresponds to TABCollectionAnimated

There are also other initialization methods that support multiple sections.

In general, the registered cell can be mapped with the original cell.

Special application scenarios:

For example, there are many types of Sina Weibo post pages.
Such a complicated page, rising to the animation level is definitely to design a unified animation.
At this time, you can rewrite a cell, then register to the form, and map out the visual effects you want through this framework. This is also the evolution of the template function.

For additional details, continue to add additional documentation or view it on the github demo.

Extended Callback

The extension callback gives the animation group to the developer, which the developer can adjust.
Because it is an adjustment, the chain syntax is added to allow developers to adjust quickly and easily.

_collectionView.tabAnimated.categoryBlock = ^(UIView * _Nonnull view) {

Parameter description (also detailed in the framework)

Chained Function Name Meaning
view.animation(x) The animation of the specified subscript of the view TABCompentLayer
view.animations(x,x) The view specifies a range of animated individual arrays for uniform adjustments
up(x) How much to move up
down(x) How much to move down
left(x) How much to move to the left
right(x) How much to move to the right
height(x) Modify Height
width(x) Modify Width
reducedWidth(x) How much is the width compared to before
reducedHeight(x) How much is the height compared to before?
radius(x) Fillet
remove() Move out animation group
toLongAnimation() Give Dynamic Variable Length Animation
toShortAnimation() Give Dynamic Short Animation

Functions that require special instructions:

line(x): number of lines

space(x): spacing

lastScale(x): the scale factor of the last line and the original width. The default value is 0.5.

If it is multi-line text, it will be assigned according to the number of numberOfLines of the text.
Note that ordinary animation elements can also achieve the special effects of multiple lines by setting these three properties.

special reminder:

  • In the TABAnimated.h file, there are global animation parameters
  • In TABViewAnimated.h, there are parameters for all animations in the control view
  • The above chained grammar, modified by specific animated individuals


Animated Individual Parameter Configuration > Control View Animation Parameter Configuration > Global Animation Parameter Configuration

Drop Animation

  1. dropIndex(xxx): means the subscript setting for discoloration,
    In general, if you don't set it up, the framework will be set up in the order in which the views are added to the view, which of course is far from satisfactory.

for example:

The first three animation elements in this effect are discolored together, and are the first color change, that is, the color change subscript is 0.
If you follow the default settings of the framework, then their color-changing subscripts are 0, 1, 2, respectively.
Obviously not meeting the demand.

At this time, you have to set it by dropIndex(xxx).
The framework is available in 2 ways:

  1. Falling multiple lines of label in an animation


All skeletons of the framework are mapped based on your original view.
If your view is UILabel and numberOfLines is not 1, then the frame will be considered as multiple lines of text.
At this point, it involves two chained grammars.

lines(xxx), meaning to modify the number of lines in the red box

space(xxx), meaning to modify the spacing in the red box

Of course, if an ordinary element can also be set to achieve the same effect, do you understand? ? ?

At this point, it is only the old content, in case some children have not used it, do not understand.

Based on this particularity,
dropFromIndex(xxx) came into being, meaning that the three elements in the red box start to change color from the subscript xxx

**Specific point: view.animation(xxx).lines(3).dropFromIndex(3);
Means: Three elements in the red frame, the first color change subscript is 3, the second color change subscript is 4, and the third color change subscript is 5. **

  1. removeOnDrop(): means that the animated element does not wish to participate in discoloration

  2. dropStayTime(xxx): color retention time ratio, default 0.2


  1. Q: Which animation component corresponds to which component?


If you build with pure code, then you add the subscripts of the animation array corresponding to the component order,
For example, if the first one is added to the cell, then its corresponding animation component is: view.animation(0)
And so on, just open your cell file and look at the hierarchy to make adjustments.

However, if you create with xib, it's a pity to tell you that the order is the order in which the xib files are associated.
The xib in the demo did a wrong demonstration, and there was a pit of caution.
There are no other good ways to find it, and I hope to collect your suggestions.

  1. UILabel with Multi-line


As mentioned above, here again,
You can use .line(x) to set the number of lines. space(x) to set the spacing.
Each animation component can set these two properties to achieve the same effect.

  1. Specify the initialization method of section loading animation

For example, animatedSectionArray = @[@(3), @(4)];

This means the first element in the cellHeightArray, animatedCountArray, cellClassArray, is the animation data when section == 3.

// Some sections have animations

_tableView.tabAnimated =
[TABTableAnimated animated WithCellClassArray:@[[TestTableViewCell class]]

_tableView.tabAnimated.categoryBlock = ^(UIView * _Nonnull view){
    view.animation(1).down(3).height (12).toShortAnimation();
  1. Expand the callback when using multiple sections
_collectionView.tabAnimated.categoryBlock = ^(UIView * _Nonnull view) {
      If ([view isKindOfClass:[CourseCollectionViewCell class]]) {

      If ([view isKindOfClass:[DailyCollectionViewCell class]]) {
  1. For nested table components, the isNest attribute of the table component to be nested needs to be set to YES. See demo for details.
_collectionView.tabAnimated = [[TABAnimatedObject alloc] init];
_collectionView.tabAnimated.isNest = YES;
_collectionView.tabAnimated.animatedCount = 3;
  1. Specify section end animation
  Ending animation for a specific partition, there is no animation in all partitions, it will automatically be set to end animation state

  @param section Specify section
- (void)tab_endAnimationWithSection:(NSInteger)section;

Attribute Related

Initialization Method Name
initWithOnlySkeleton Skeleton Screen
initWithBinAnimation Breathing Light Animation
initWithShimmerAnimated Shimmer Animation
initWithDropAnimated Drop Animation

If the control view's superAnimationType is set, it will be loaded with the animation type declared by superAnimationType

**Global animation properties: **


[TABAnimated shareAnimated].xxx = xxx;
Property Name Applicable Animation Meaning Default
animatedColor General Animated Color 0xEEEEEE
animatedBackgroundColor General Animated Background Color UIColor.white
animatedDuration Dynamic Animation Move back and forth 1.0
longToValue Dynamic Animation Scale 1.9
shortToValue Dynamic Animation Scale 0.6
animatedDurationShimmer Shimmer Animation Movement Duration 1.5
animatedHeightCoefficient General Height Coefficient 0.75
useGlobalCornerRadius General Open Global Fillet NO
animatedCornerRadius General Global Fillet 0.
openLog Universal Open Log NO
useGlobalAnimatedHeight without UIImageView use Global Animated Height NO
animatedHeight without UIImageView Global Animated Height 12.
dropAnimationDuration drop Animation drop duration 0.4
dropAnimationDeepColor drop Animation changed color 0xE1E1E1

All animation property configurations under control view:


_tableView.tabAnimated.xxx = xxx;
Property Name Scope Meaning Default
superAnimationType General This control view animation type Default global properties
animatedCount Table Components Number of Animations Filling the Table Visible Area
animatedColor General Animated Content Color UIColor.white
animatedBackgroundColor General Animated Background Color 0xEEEEEE
cancelGlobalCornerRadius General Unused Global Fillet NO
animatedCornerRadius General Animated fillets in this control view 0.
animatedHeight General Animation height under this control view 0.
isAnimating General Is it in animation \
isNest General Is it a nested table NO
canLoadAgain General Is it can load again NO
dropAnimationDuration drop Animation drop duration 0.4
dropAnimationDeepColor drop Animation changed color 0xE1E1E1