我有一个由NSFetchedResultsController填充的UITableView。
在表的初始加载中,我希望单元格可以动画,但我想做一些比自定义动画更多的
[tableView insertRowsAtIndexPaths:withRowAnimation:];
允许。具体来说,我想放慢动画的速度,让它们以特定的方式从侧面飞入。我无法通过UITableViewRowAnimation常量实现此目的。有没有办法使用Core Animation来完成我想要的或者我需要在这个特定实例中坚持使用UIKit动画?
感谢您的帮助!
乔尔
答案 0 :(得分:36)
最新解决方案(2017-12-12)
添加animate方法的 Swift 4.0 版本。然后应该以与下面的解决方案相同的方式实现它:
func animate() {
for cell in self.tableView.visibleCells {
cell.frame = CGRect(x: self.tableView.frame.size.width, y: cell.frame.origin.y, width: cell.frame.size.width, height: cell.frame.size.height)
UIView.animate(withDuration: 1.0) {
cell.frame = CGRect(x: 0, y: cell.frame.origin.y, width: cell.frame.size.width, height: cell.frame.size.height)
}
}
}
NEWER SOLUTION(2015-09-05)
添加动画方法的Swift 2.0版本。然后应该以与下面的解决方案相同的方式实现它:
func animate() {
for cell in self.tableView.visibleCells {
cell.frame = CGRectMake(320, cell.frame.origin.y, cell.frame.size.width, cell.frame.size.height)
UIView.animateWithDuration(1.0) {
cell.frame = CGRectMake(0, cell.frame.origin.y, cell.frame.size.width, cell.frame.size.height)
}
}
}
新解决方案(2014-09-28)
我稍微改进了解决方案,使实现更容易,并使其适用于iOS8。您需要做的就是在TableViewController中添加这个animate
方法,并在需要它时进行动画调用(例如,在您的重载方法中,但您可以随时调用它):
- (void)animate
{
[[self.tableView visibleCells] enumerateObjectsUsingBlock:^(UITableViewCell *cell, NSUInteger idx, BOOL *stop) {
[cell setFrame:CGRectMake(320, cell.frame.origin.y, cell.frame.size.width, cell.frame.size.height)];
[UIView animateWithDuration:1 animations:^{
[cell setFrame:CGRectMake(0, cell.frame.origin.y, cell.frame.size.width, cell.frame.size.height)];
}];
}];
}
再次,按照自己喜欢的方式更改动画。此特定代码将以较慢的速率从右侧为单元格设置动画。
OLD SOLUTION(2013-06-06)
您可以通过实现自己的UITableView并重写insertRowsAtIndexPaths方法来完成此操作。下面是一个例子,说明如何从右边推动细胞,非常慢(1秒动画):
- (void)insertRowsAtIndexPaths:(NSArray *)indexPaths withRowAnimation:(UITableViewRowAnimation)animation
{
for (NSIndexPath *indexPath in indexPaths)
{
UITableViewCell *cell = [self cellForRowAtIndexPath:indexPath];
[cell setFrame:CGRectMake(320, cell.frame.origin.y, cell.frame.size.width, cell.frame.size.height)];
[UIView beginAnimations:NULL context:nil];
[UIView setAnimationDuration:1];
[cell setFrame:CGRectMake(0, cell.frame.origin.y, cell.frame.size.width, cell.frame.size.height)];
[UIView commitAnimations];
}
}
您可以自己动手制作动画。表视图不会自动调用此方法,因此您必须覆盖表视图委托中的reloadData方法并自行调用此方法。
<强> COMMENT 强>
reloadData方法应如下所示:
- (void)reloadData
{
[super reloadData];
NSMutableArray *indexPaths = [[NSMutableArray alloc] init];
for (int i = 0; i < [_data count]; i++)
[indexPaths addObject:[NSIndexPath indexPathForRow:i inSection:0]];
[self insertRowsAtIndexPaths:indexPaths withRowAnimation:0];
}
答案 1 :(得分:8)
[self cellForRowAtIndexPath:indexPath];
之后我已经没有了
这是我在UITableView
的子类中的代码:
- (void)insertRowsAtIndexPaths:(NSArray *)indexPaths
withRowAnimation:(UITableViewRowAnimation)animation
{
[super insertRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationNone];
[self endUpdates]; // Populates UITableView with data
[self beginUpdates];
for (NSIndexPath *indexPath in indexPaths) {
__block UITableViewCell *cell = [super cellForRowAtIndexPath:indexPath];
if (cell) { // If indexPath isn't visible we'll get nil here
// Custom animation
CGRect frame = cell.frame;
frame.origin.x = cell.frame.size.width;
cell.frame = frame;
frame.origin.x = 0;
void (^animationsBlock)() = ^{
cell.frame = frame;
};
if ([[UIView class] respondsToSelector:
@selector(animateWithDuration:delay:usingSpringWithDamping:
initialSpringVelocity:options:animations:completion:)]) {
[UIView animateWithDuration:0.3
delay:0
usingSpringWithDamping:0.5
initialSpringVelocity:0
options:0
animations:animationsBlock
completion:NULL];
} else {
[UIView animateWithDuration:0.3
delay:0
options:UIViewAnimationOptionCurveEaseIn
animations:animationsBlock
completion:NULL];
}
}
}
}
答案 2 :(得分:1)
使用此:
-(void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath{
[cell setFrame:CGRectMake(320, cell.frame.origin.y, cell.frame.size.width, cell.frame.size.height)];
[UIView animateWithDuration:2 animations:^{
[cell setFrame:CGRectMake(100, cell.frame.origin.y, cell.frame.size.width, cell.frame.size.height)];
}];
}
答案 3 :(得分:0)
Swift 3.0 版本的Mattias Eriksson的回答
func animate() {
for cell in tblView.visibleCells {
cell.frame = CGRect(x:320, y:cell.frame.origin.y, width:cell.frame.size.width, height:cell.frame.size.height)
UIView.animate(withDuration: 1.0) {
cell.frame = CGRect(x:0, y:cell.frame.origin.y, width:cell.frame.size.width, height:cell.frame.size.height)
}
}
}