Helo all,
I have create a UIcollectionView cell.I want set the height & width propotional to all devices.For eg.If height 80 & width is 90 on iphone 5s then it should be propotional on other devices as well.I am using this method.
-(CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath
{
return CGSizeMake(80, 90);
}
Try using this
-(CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath{
return CGSizeMake(self.view.frame.size.width/.25, self.view.frame.size.width/.28);
}
All you have to do is multiply the dimensions of your cell by whatever proportion you desire. If 80x90 is the size you want on the iPhone 5, then calculate the appropriate multipliers by consulting a guide like this one. For example, the 5's point resolution is 320 x 568, and the 6's is 375 x 667, so your width multiplier will be 375/320, and the height one will be 667/568. (I'll let you do the math. :))
use this
-(CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath{
return CGSizeMake(self.view.frame.size.width/2, self.view.frame.size.width/2);
-(CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout minimumLineSpacingForSectionAtIndex:(NSInteger)section{
return 0
;}
-(CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout minimumInteritemSpacingForSectionAtIndex:(NSInteger)section{
return 0; }
Related
enter image description here/Users/seedoo/Desktop/Simulator Screen Shot 28-Jul-2017, 1.33.59 PM.png
/Users/seedoo/Desktop/Simulator Screen Shot 28-Jul-2017, 1.34.37 PM.png
The gaps between the cells is less in iPhone 5s device than in 6s.Please let me know how to solve this issue.Thanks in advance.
Try this : make changes in all methods as per your needs
Objective C
- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath{
return CGSizeMake(collectionView.frame.size.width/2 -5, 135); // 2 is indicates number of cell in sigle row
}
- (UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout insetForSectionAtIndex:(NSInteger)section{
return UIEdgeInsetsMake(0, 0, 0, 0);
}
- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout minimumInteritemSpacingForSectionAtIndex:(NSInteger)section{
return 10.0f;
}
- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout minimumLineSpacingForSectionAtIndex:(NSInteger)section
{
return 10.0f;
}
I have created a UICollectionView which is having custom cells.Now to main the height width ratio of cell on each device i have added the below code.But for ipad i have defined the fix height/width but in this case it is taking the gap between cells.Please tell me how can i remove the gap between cells?
// 1
- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath
{
float first_width_per,first_height_per,final_width,final_height;
first_width_per=((150/self.collectionView.frame.size.width)*100);
first_height_per=((180/self.collectionView.frame.size.height)*100);
first_width_per=46.875000;
first_height_per=48.780487;
final_width=((first_width_per*self.collectionView.frame.size.width)/100);
final_height=((first_height_per*self.collectionView.frame.size.height)/100);
if(IS_IPAD)
{
final_width=200;
final_height=220;
}
return CGSizeMake(final_width, final_height);
}
// 3
- (UIEdgeInsets)collectionView:
(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout insetForSectionAtIndex:(NSInteger)section
{
return UIEdgeInsetsMake(5, 5, 5, 5);
}
-(CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout minimumLineSpacingForSectionAtIndex:(NSInteger)section
{
return 5
;
}
-(CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout minimumInteritemSpacingForSectionAtIndex:(NSInteger)section
{
return 5;
}
I am trying to make the spacing between my cells = 5
In the iPhone 4s the UICollectionViewCell becomes a square but I need rectangle.
I need iPhone4s iPhone5 iPhone6 iPhone 6Plus the cell, but the width and height of the cell is always wrong. I don't know how to do it automatically.
This is my code:
- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath
{
return CGSizeMake(([UIScreen mainScreen].bounds.size.width - 20) /2, ([UIScreen mainScreen].bounds.size.height) /3);
}
- (UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout insetForSectionAtIndex:(NSInteger)section
{
return UIEdgeInsetsMake(5, 5, 5, 5);
}
What am I missing? Thanks in advance!
some change in your code will works fine
- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath
{
int itemWidth=([UIScreen mainScreen].bounds.size.width - 20)/2;
int intemHeight=itemWidth*2/3;
return CGSizeMake(itemWidth, intemHeight);
}
I'm using a collection view inside of a static table view cell and I'm using autolayout to define the collection view's frame. Also, I'm using FlowLayout as the collectionViewLayout.
The problem:
The behaviour is just as expected for the iPhone 4s and 5 screen. (same width)
Once the width changes (iPhone 6 and 6 Plus), the collection view resizes properly, but the content keeps it size.
This happens both for the cells and for the sections.
Extra info:
I'm setting collectionViewLayout minimumInteritemSpacingForSectionAtIndex to zero.
The width of the cells is always being set to tableView.frame.size.width / 2
Where I configure the layout:
CGFloat headerHeight = 52;
collectionViewLayout.sectionInset = UIEdgeInsetsMake(0, 0, 0, 0);
collectionViewLayout.headerReferenceSize = CGSizeMake(self.width, headerHeight);
This is what it looks now. The green part represents the UICollectionView. Black and blue the cells. The dividing lines should be resizing and the cells should be divided in 2 columns.
From the code you posted, you are just setting the size for the header but I suppose you also have something like
collectionViewLayout.itemSize = CGSizeMake(self.collectionView.frame.width/2, height);
The important part is in which method you configure this, because if you do it in viewDidLoad the views are not correctly layouted yet so the width would just be the one set in the storyboard, no matter on which device you run your app.
The solution would be to place the code above in viewWillLayoutSubviews
- (void)viewWillLayoutSubviews {
[super viewWillLayoutSubviews];
collectionViewLayout.itemSize = CGSizeMake(self.collectionView.frame.width/2, height);
collectionViewLayout.headerReferenceSize = CGSizeMake(self.collectionView.frame.width/2, height);
}
Another way would be to implement the flowLayout delegate method:
-(CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath {
return cCGSizeMake(collectionView.frame.width/2, CUSTOM_HEIGHT);
}
// The same for the header
- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout referenceSizeForHeaderInSection:(NSInteger)section {
return cCGSizeMake(collectionView.frame.width/2, CUSTOM_HEIGHT);
}
Make sure you set the delegate for the collectionView
Let me know how it goes :)
Update
For the cells, add these methods too:
- (UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout insetForSectionAtIndex:(NSInteger)section {
return CGRectZero;
}
- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout minimumInteritemSpacingForSectionAtIndex:(NSInteger)section {
return 0;
}
As for the sectionHeader, maybe you need to check the constraints you have there, for the separator for example.
Be sure to use all the following for precise styling:
-(NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView;
-(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section;
-(CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath;
-(UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout insetForSectionAtIndex:(NSInteger)section;
-(CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout minimumInteritemSpacingForSectionAtIndex:(NSInteger)section;
-(CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout minimumLineSpacingForSectionAtIndex:(NSInteger)section;
-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath;
-(void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath;
To change the cell content size, use this:
-(CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath
{
return CGSizeMake((kScreenWidth/2-8), 44); // Use your own X and Y sizes
}
https://dl.dropboxusercontent.com/s/u91qmcqg1tdabv4/stackoverflow-01.png
Like this, but, return will make 0.5 change to 0.
Call this method(use UICollectionViewDelegateFlowLayout):
- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath
{
if (_heightIsZero)
return CGSizeMake(320, 0);
else
return CGSizeMake(320, 75);
}
This height is the calculation of pixels and you cannot put pixels in point; they are always numbers 0,1,2,3,4...