我想创建一个新闻应用程序。我设计了我的故事板in this case，结果就像this image。如何删除细胞之间的差距？
这是我的代码。在此代码中，我有一个集合视图和两个名为firstrow和secondrow
@interface cillectionview ()
{
NSMutableArray *images;
NSMutableArray *titles;
NSMutableArray *items;
NSMutableArray *newssurls;
NSMutableArray *namesOftags;
NSString *liveurl;
AppDelegate *appDelegate;
int imgindex ;
}
@end
@implementation cillectionview
@synthesize mids,collectionView;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.navigationController.navigationBar.barTintColor = UIColorFromRGB(0x303030);
//
// collectionView.delegate = self;
// collectionView.dataSource = self;
[collectionView setShowsVerticalScrollIndicator:NO];
UICollectionViewFlowLayout *collectionViewLayout = (UICollectionViewFlowLayout*)self.collectionView.collectionViewLayout;
collectionViewLayout.collectionView.delegate =self;
collectionViewLayout.sectionInset = UIEdgeInsetsMake(0, 0, 0, 0);
collectionViewLayout.minimumInteritemSpacing = 0;
collectionViewLayout.minimumLineSpacing = 0;
UIBarButtonItem *liveItem = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"liveitem@2x.png"] style:UIBarButtonItemStylePlain target:self action:@selector(showLive:)];
UIBarButtonItem *tagItem = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"tagitem@2x.png"] style:UIBarButtonItemStylePlain target:self action:@selector(tagScreen)];
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setImage:[UIImage imageNamed:@"hispan@2x.png"] forState:UIControlStateNormal];
[button setFrame:CGRectMake(0, 0, 80, 51)];
UIBarButtonItem *logoButton = [[UIBarButtonItem alloc] initWithCustomView:button];
self.navigationItem.leftBarButtonItem = logoButton;
logoButton.enabled = NO;
[liveItem setTintColor:[UIColor orangeColor]];
[tagItem setTintColor:[UIColor orangeColor]];
NSArray *actionButtonItems = @[liveItem, tagItem];
self.navigationItem.rightBarButtonItems = actionButtonItems;
items = [[NSMutableArray alloc]init];
images = [[NSMutableArray alloc]init];
titles = [[NSMutableArray alloc]init];
mids = [[NSMutableArray alloc]init];
newssurls = [[NSMutableArray alloc]init];
imgindex = 0;
appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
liveurl = [appDelegate getlivelink];
mids = [appDelegate mIds];
titles = [appDelegate mTitles];
for (int i =0 ; i<[mids count]; i++) {
NSMutableString* aUrl;
if(i%3 == 0){
aUrl = [NSMutableString stringWithFormat:@"http://hispantv.com/services/news.asmx/ContentsByCategory?category=%d&count=%d&imagesize=xl",[mids[i] intValue],1];
}else{
aUrl = [NSMutableString stringWithFormat:@"http://hispantv.com/services/news.asmx/ContentsByCategory?category=%d&count=%d&imagesize=l",[mids[i] intValue],1];
}
contentHelper *helper =[[contentHelper alloc]initWithDelegate:self mainQuery:aUrl];
[items addObject:[helper newss]];
}
for (int i =0 ; i<[mids count]; i++) {
NSMutableString* Url;
Url = [NSMutableString stringWithFormat:@"http://hispantv.com/services/news.asmx/ContentsByCategory?category=%d&count=%d&imagesize=l",[mids[i] intValue],20];
[newssurls addObject:Url];
}
for (NSArray *n in items) {
[images addObject:[n[0] image]];
}
}
////////////
////////////
- (void)tagScreen
{
[appDelegate createtag];
namesOftags =[[NSMutableArray alloc]init];
NSMutableArray *names = [[NSMutableArray alloc]init];
NSMutableArray *ids = [[NSMutableArray alloc]init];
namesOftags = [appDelegate GetTagName];
for (NSMutableDictionary *strdic in namesOftags) {
[names addObject:[strdic objectForKey:@"name"]];
[ids addObject:[NSString stringWithFormat:@"%d",[[strdic objectForKey:@"id"]intValue]]];
}
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:[NSBundle mainBundle]];
TagTableViewController *navigationController = [storyboard instantiateViewControllerWithIdentifier:@"TagTableViewController"];
//navigationController.titleText = self.titleText;
navigationController.cellTitles = names;
navigationController.cellIds = ids;
[self presentViewController:navigationController animated:YES completion:nil];
[appDelegate GetChild:@""];
}
-(void) getContent:(NSMutableArray *)array{
self.newss = [[NSMutableArray alloc]init];
self.newss = array;
//
for (News *n in self.newss) {
//NSLog(n.title);
}
NSLog(@"getcount: #%i",[_newss count]);
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
return 6;
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
NSString *identifier;
switch (indexPath.row ) {
case 0:
imgindex =0;
break;
case 1:
imgindex =0;
break;
case 2:
imgindex =1;
break;
case 3:
imgindex =1;
break;
case 4:
imgindex =2;
break;
case 5:
imgindex =2;
break;
default:
break;
}
if(indexPath.row %2 == 0 ){
identifier = @"Cell";
firstrow *cell = (firstrow*)[collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath];
[cell.bigimg setImageWithURL:[NSURL URLWithString:images[indexPath.row + imgindex ]] placeholderImage:[UIImage imageNamed:@"placeholder"]];
cell.bTitle.text = titles[indexPath.row + imgindex];
cell.bigimg.tag = indexPath.row + imgindex ;
UITapGestureRecognizer *rtapRecognizer = [[UITapGestureRecognizer alloc]
initWithTarget:self action:@selector(bigimagetouchesBegan:)];
[rtapRecognizer setNumberOfTouchesRequired:1];
[rtapRecognizer setDelegate:self];
cell.bigimg.userInteractionEnabled = YES;
[cell.bigimg addGestureRecognizer:rtapRecognizer];
return cell;
}else {
identifier = @"smallCell";
secondrow * cell = (secondrow *)[collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath];
[cell.leftimg setImageWithURL:[NSURL URLWithString:images[indexPath.row + imgindex ]] placeholderImage:[UIImage imageNamed:@"placeholder"]];
cell.lTitle.text = titles[indexPath.row + imgindex];
cell.leftimg.tag = indexPath.row + imgindex ;
imgindex ++;
cell.rTitle.text = titles[indexPath.row + imgindex];
[cell.rightimg setImageWithURL:[NSURL URLWithString:images[indexPath.row + imgindex ]] placeholderImage:[UIImage imageNamed:@"placeholder"]];
cell.rightimg.tag = indexPath.row + imgindex ;
imgindex ++;
UITapGestureRecognizer *rtapRecognizer = [[UITapGestureRecognizer alloc]
initWithTarget:self action:@selector(rtouchesBegan:)];
[rtapRecognizer setNumberOfTouchesRequired:1];
[rtapRecognizer setDelegate:self];
cell.rightimg.userInteractionEnabled = YES;
[cell.rightimg addGestureRecognizer:rtapRecognizer];
UITapGestureRecognizer *ltapRecognizer = [[UITapGestureRecognizer alloc]
initWithTarget:self action:@selector(ltouchesBegan:)];
[ltapRecognizer setNumberOfTouchesRequired:1];
[ltapRecognizer setDelegate:self];
cell.leftimg.userInteractionEnabled = YES;
[cell.leftimg addGestureRecognizer:ltapRecognizer];
return cell;
}
}
#pragma mark - UICollectionViewDelegate
-(void) rtouchesBegan:(UITapGestureRecognizer *)gr
{
UIImageView *theTappedImageView = (UIImageView *)gr.view;
NSInteger tag = theTappedImageView.tag;
NSMutableArray * a = [[NSMutableArray alloc ]init];
contentHelper *helper =[[contentHelper alloc]initWithDelegate:self mainQuery:[newssurls objectAtIndex:tag]];
a =[helper newss];
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:[NSBundle mainBundle]];
PageContentViewController *navigationController = [storyboard instantiateViewControllerWithIdentifier:@"contentViewController"];
navigationController.newss = a;
navigationController.titleText = [titles objectAtIndex:tag];
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:navigationController];
[self presentViewController:navController animated:YES completion:nil];
}
-(void) ltouchesBegan:(UITapGestureRecognizer *)gr
{
UIImageView *theTappedImageView = (UIImageView *)gr.view;
NSInteger tag = theTappedImageView.tag;
NSLog(@" %d",tag);
NSMutableArray * a = [[NSMutableArray alloc ]init];
contentHelper *helper =[[contentHelper alloc]initWithDelegate:self mainQuery:[newssurls objectAtIndex:tag]];
a =[helper newss];
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:[NSBundle mainBundle]];
PageContentViewController *navigationController = [storyboard instantiateViewControllerWithIdentifier:@"contentViewController"];
navigationController.newss = a;
navigationController.titleText = [titles objectAtIndex:tag];
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:navigationController];
[self presentViewController:navController animated:YES completion:nil];
}
-(void) bigimagetouchesBegan:(UITapGestureRecognizer *)gr
{
UIImageView *theTappedImageView = (UIImageView *)gr.view;
NSInteger tag = theTappedImageView.tag;
NSLog(@" %d",tag);
NSMutableArray * a = [[NSMutableArray alloc ]init];
contentHelper *helper =[[contentHelper alloc]initWithDelegate:self mainQuery:[newssurls objectAtIndex:tag]];
a =[helper newss];
NSLog(@"number is #%i",[a count]);
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:[NSBundle mainBundle]];
PageContentViewController *navigationController = [storyboard instantiateViewControllerWithIdentifier:@"contentViewController"];
navigationController.newss = a;
navigationController.titleText = [titles objectAtIndex:tag];
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:navigationController];
[self presentViewController:navController animated:YES completion:nil];
}
答案 0 :(得分：0)
您需要：1。覆盖标准流程布局。 2.添加类似的实现：
- (NSArray *) layoutAttributesForElementsInRect:(CGRect)rect {
NSArray *answer = [super layoutAttributesForElementsInRect:rect];
for(int i = 1; i < [answer count]; ++i) {
UICollectionViewLayoutAttributes *currentLayoutAttributes = answer[i];
UICollectionViewLayoutAttributes *prevLayoutAttributes = answer[i - 1];
NSInteger maximumSpacing = 4;
NSInteger origin = CGRectGetMaxX(prevLayoutAttributes.frame);
if(origin + maximumSpacing + currentLayoutAttributes.frame.size.width < self.collectionViewContentSize.width) {
CGRect frame = currentLayoutAttributes.frame;
frame.origin.x = origin + maximumSpacing;
currentLayoutAttributes.frame = frame;
}
}
return answer;
}
其中maximumSpacing可以设置为您喜欢的任何值。这个技巧保证了单元格之间的空间完全等于maximumSpacing。
希望这会对你有所帮助。
更新回答：
#pragma mark Collection view layout things
// Layout: Set cell size
- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath {
NSLog(@"SETTING SIZE FOR ITEM AT INDEX %d", indexPath.row);
CGSize mElementSize = CGSizeMake(104, 104);
return mElementSize;
}
- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout minimumInteritemSpacingForSectionAtIndex:(NSInteger)section {
return 2.0;
}
- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout minimumLineSpacingForSectionAtIndex:(NSInteger)section {
return 2.0;
}
// Layout: Set Edges
- (UIEdgeInsets)collectionView:
(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout insetForSectionAtIndex:(NSInteger)section {
// return UIEdgeInsetsMake(0,8,0,8); // top, left, bottom, right
return UIEdgeInsetsMake(0,0,0,0); // top, left, bottom, right
}
使用此功能。