I have that kind of requirement, if user has selected 1 then I have to display images (which is in collection view cell) by rotating at 90 degree and if user had selected 4 then I have to display images as round. For selection 2 and 3 display image as it is.
For that I written below code.
self.addEventListener('message', function(e) {
function load(url){
var xmlhttp=new XMLHttpRequest();
xmlhttp.onreadystatechange=function()
{
if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
console.log(xmlhttp);
self.postMessage({'url':url});
}
}
xmlhttp.open("GET",url,true);
xmlhttp.send();
}
var urls = e.data.args[0];
for(var i = 0; i<urls.length; i++){
load(urls[i]);
}
}, false);
and on selection 1,2,3 or 4 I'm reloading collection view.
The problem is that if user selected 4 after selecting 1 then some of images after displays rotated and after that if user selects 2 or 3 some images rotated and some images circle. I have tried to delete section before reloading as per mention here but app crashes and log is
*** Assertion failure in -[UICollectionView _endItemAnimations], /SourceCache/UIKit/UIKit-3318.93/UICollectionView.m:3917
reloading code is as below:
console.log();UPDATE:
If tried to using - (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
FilterCell *cell = (FilterCell *)[collectionView dequeueReusableCellWithReuseIdentifier:@"filterCell" forIndexPath:indexPath];
if (!cell) {
cell = [[FilterCell alloc] init];
}
if (filterScreen==1) {
cell.imgView.image = [collectionImage objectAtIndex:indexPath.row];
cell.imgView.transform = CGAffineTransformMakeRotation(M_PI_2);
}
else if (filterScreen==2) {
cell.imgView.image = [UIImage imageNamed:[NSString stringWithFormat:@"filter_%ld",(long)indexPath.row]];
}
else if (filterScreen==3) {
cell.imgView.image = [UIImage imageNamed:[NSString stringWithFormat:@"motiontitle_contents_%ld",(long)indexPath.row]];
}
else if (filterScreen==4) {
cell.imgView.image = [UIImage imageNamed:[NSString stringWithFormat:@"bgm_%ld",(long)indexPath.row]];
cell.imgView.layer.cornerRadius = cell.imgView.frame.size.height /2;
cell.imgView.layer.masksToBounds = YES;
}
return cell;
}
then getting
*** Assertion failure in -[UICollectionView _endItemAnimations], /SourceCache/UIKit/UIKit-3318.93/UICollectionView.m:3901
can anyone help me to solve this?
答案 0 :(得分：2)
Okay it took a while for me to understand your problem.
First, the solution you are trying is wrong. You want to reload a section but delete it instead (try <%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
</head>
<body>
This is a test page...
<p>
should show firstname and lastname:
<s:property value="firstname"/>
<s:property value="lastname"/>
</p>
</body>
</html>
instead).
However, that won't solve your problem either. Cells are reused and you never reset the import com.opensymphony.xwork2.ActionSupport;
public class Basic extends ActionSupport{
private String firstname = "me";
private String lastname = "I";
public String getFirstname() {
return firstname;
}
public void setFirstname(String firstname) {
this.firstname = firstname;
}
public String getLastname() {
return lastname;
}
public void setLastname(String lastname) {
this.lastname = lastname;
}
public String execute() {
return SUCCESS;
}
}
property. Try this:
reloadSections