几种cell动画

最新推荐文章于 2018-03-21 11:36:56 发布

hufeng825

最新推荐文章于 2018-03-21 11:36:56 发布

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分类专栏：动画 object-c

本文链接：https://blog.youkuaiyun.com/hufengvip/article/details/39496201

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这篇博客介绍了如何在UITableView中为单元格(cell)添加动画效果。在`willDisplayCell`方法中，通过设置cell的layer属性，包括阴影颜色、偏移、透明度和缩放变换，实现了两种不同的动画效果：一种是渐显并平滑调整阴影和尺寸；另一种是通过改变高度和位置，配合alpha值变化，实现淡入和高度变化的动画。这些动画为表格视图增添了视觉吸引力。

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-(void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath{

if (indexPath.row == 1 && indexPath.section <2) {

cell.layer.shadowColor = [[UIColor blackColor] CGColor];

cell.layer.shadowOffset = CGSizeMake(10, 10);

cell.alpha = 0;

cell.layer.transform = CATransform3DMakeScale(0.5, -0.15, 1);

cell.layer.anchorPoint = CGPointMake(0.5, -0.5);

// define final state (e.g. after animation) & commit animation

[UIView beginAnimations:@"scaleTableViewCellAnimationID" context:NULL];

[UIView setAnimationDuration:1];

cell.layer.shadowOffset = CGSizeMake(0, 0);

cell.alpha = 1;

cell.layer.transform = CATransform3DIdentity;

[UIView commitAnimations];

}

-(void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath{

if ([[NSUserDefaults standardUserDefaults]boolForKey:kCouponCacheFlag] ) {

if (indexPath.row == 1 && indexPath.section <2) {

// cell.layer.shadowColor = [[UIColor blackColor] CGColor];

// cell.layer.shadowOffset = CGSizeMake(10, 10);

// cell.alpha = 0;

// cell.layer.transform = CATransform3DMakeScale(1, -1, 1);

// cell.layer.anchorPoint = CGPointMake(0.5, -0.5);

cell.height = 64 ;

cell.alpha = 0;

cell.top = cell.top-96;

[UIView animateWithDuration:.8 delay:indexPath.section*.5 options:UIViewAnimationOptionCurveEaseInOut animations:^{

cell.layer.shadowOffset = CGSizeMake(0, 0);

cell.alpha = 1;

// cell.layer.transform = CATransform3DIdentity;

cell.height = 96;

cell.top = 0;

} completion:^(BOOL finished) {

}];

}

//This function is where all the magic happens

//-(void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath{

// if (indexPath.row ==1) {

// if(kAnimationFlag==2)

// return;

// CGFloat originHeight = cell.height;

// cell.top = -originHeight;

// cell.height = 0;

// [UIView animateWithDuration:.2*(indexPath.section+2)

// delay:0 options:UIViewAnimationOptionCurveEaseInOut animations:^{

// cell.top = 0;

// cell.height = originHeight;

// kAnimationFlag ++;

// } completion:^(BOOL finished){

// kAnimationFlag--;

// }];

// }

//// //1. Setup the CATransform3D structure

//// CATransform3D rotation;

//// rotation = CATransform3DMakeRotation( (90.0*M_PI)/180, 0.0, 0.7, 0.4);

//// rotation.m34 = 1.0/ -600;

////

//// //2. Define the initial state (Before the animation)

//// cell.layer.shadowColor = [[UIColor blackColor]CGColor];

//// cell.layer.shadowOffset = CGSizeMake(10, 10);

////cell.alpha = 0;

////cell.layer.transform = rotation;

////cell.layer.anchorPoint = CGPointMake(0, 0.5);

////3. Define the final state (After the animation) and commit the animation

//[UIView beginAnimations:@"postio" context:NULL];

//[UIView setAnimationDuration:0.8];

//cell.layer.transform = CATransform3DIdentity;

//cell.alpha = 1;

//cell.layer.shadowOffset = CGSizeMake(0, 0);

//[UIView commitAnimations];

// }

//}