मुझे लगातार UICollectionView में कक्षों को प्रदर्शित करने में समस्या हो रही है। कोशिकाओं का प्रारंभिक प्रदर्शन सही है, हालांकि हर बार जब उपयोगकर्ता अतीत को स्क्रॉल करता है और फिर कोशिकाओं के समूह में वापस प्रदर्शित होता है तो प्रदर्शन गलत होता है। पंक्तियों में केवल 2 या 1 सेल होना चाहिए। 2 कोशिकाएं प्रत्येक आधा प्रदर्शन चौड़ाई लेती हैं, 1 सेल पूर्ण चौड़ाई लेती है।UICollectionView लगातार लेआउट नहीं है, UICollectionViewFlowLayout
- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath
{
return [self preferredSizeForIndexPath:indexPath];
}
- (CGSize)preferredSizeForIndexPath:(NSIndexPath *)indexPath {
BOOL isLastObjectInSection = NO;
NSString *sectionKey = [[arrCollectionData[indexPath.section] allKeys] objectAtIndex:0];
DLog(@"SectionKey: %@", sectionKey);
NSArray *arrSection = [arrCollectionData[indexPath.section] objectForKey:sectionKey];
DLog(@"ArrSection: %@", arrSection);
if (arrSection[indexPath.row] == arrSection.lastObject) {
if(arrSection.count % 2 != 0) {
isLastObjectInSection = YES;
}
}
CGSize cellSize = CGSizeZero;
if (UIDeviceOrientationIsLandscape([[UIDevice currentDevice] orientation])) {
if (isLastObjectInSection == YES) {
cellSize = CGSizeMake(IPAD_BADGE_WIDTH_LANDSCAPE_WIDE, IPAD_BADGE_HEIGHT_LANDSCAPE_WIDE);
} else {
cellSize = CGSizeMake(IPAD_BADGE_WIDTH_LANDSCAPE, IPAD_BADGE_HEIGHT_LANDSCAPE);
}
} else {
if (isLastObjectInSection == YES) {
cellSize = CGSizeMake(IPAD_BADGE_WIDTH_WIDE, IPAD_BADGE_HEIGHT_WIDE);
} else {
cellSize = CGSizeMake(IPAD_BADGE_WIDTH, IPAD_BADGE_HEIGHT);
}
}
DLog(@"CellSize: %@", NSStringFromCGSize(cellSize));
return cellSize;
}
नीचे संग्रह डेटा का नमूना है।
Printing description of self->arrCollectionData:
<__NSArrayI 0x94bbc40>(
{
"March 12, 2013" = (
"<FMLeafTimelineContainer: 0x94b2430>",
"<FMLeafTimelineContainer: 0x94b3670>"
);
},
{
"February 25, 2013" = (
"<FMLeafTimelineContainer: 0x94b4500>"
);
},
{
"February 14, 2013" = (
"<FMLeafTimelineContainer: 0x94b48f0>",
"<FMLeafTimelineContainer: 0x94b3a60>"
);
},
{
"February 12, 2013" = (
"<FMLeafTimelineContainer: 0x94b3ce0>",
"<FMLeafTimelineContainer: 0x94b2b00>"
);
},
{
"February 4, 2013" = (
"<FMCommunityTimelineContainer: 0x94b4e90>",
"<FMCommunityTimelineContainer: 0x94b5050>",
"<FMCommunityTimelineContainer: 0x94b5f70>"
);
},
{
"January 30, 2013" = (
"<FMCommunityTimelineContainer: 0x94b6ad0>",
"<FMCommunityTimelineContainer: 0x94b5a90>"
);
},
{
"January 24, 2013" = (
"<FMCommunityTimelineContainer: 0x94b5d00>",
"<FMCommunityTimelineContainer: 0x94b6d90>"
);
},
{
"January 22, 2013" = (
"<FMCommunityTimelineContainer: 0x94b6440>"
);
},
{
"January 21, 2013" = (
"<FMCommunityTimelineContainer: 0x94b6260>",
"<FMCommunityTimelineContainer: 0x94b62e0>",
"<FMCommunityTimelineContainer: 0x94b70c0>",
"<FMCommunityTimelineContainer: 0x94b55a0>",
"<FMCommunityTimelineContainer: 0x94b82d0>",
"<FMCommunityTimelineContainer: 0x94b78b0>"
);
},
{
"December 20, 2012" = (
"<FMCommunityTimelineContainer: 0x94b53f0>"
);
},
{
"December 6, 2012" = (
"<FMCommunityTimelineContainer: 0x94b7200>"
);
},
{
"December 4, 2012" = (
"<FMCommunityTimelineContainer: 0x94b72b0>"
);
},
{
"November 19, 2012" = (
"<FMCommunityTimelineContainer: 0x94b7ae0>"
);
}
)
सभी चित्र नीचे संग्रह दृश्य के समान अनुभाग को प्रदर्शित करते हैं।