CollectionView's case

1. #import "ViewController.h"
2. #import "CollectionViewCell.h"
3. @interface Viewcontroller () <uicollectionviewdatasource,uicollectionviewdelegate, Uicollectionviewdelegateflowlayout>
4. @property (Weak, nonatomic) Iboutlet Uicollectionview *collectioncell;
5. @end

2. @implementation Viewcontroller
4. -(void) viewdidload
6. {
8. [Super Viewdidload];
10. Self.collectionCell.backgroundColor = [Uicolor Greencolor];
12. Self.collectionCell.dataSource = self;
14. Self.collectionCell.delegate = self;
16. }
18. #pragma mark--Uicollectionviewdatasource
20. Set the number of Collectioncell
22. -(Nsinteger) CollectionView: (Uicollectionview *) CollectionView numberofitemsinsection: (NSInteger) Section
24. {
26. return 9;
28. }
30. Define the number of sections to show
32. -(Nsinteger) Numberofsectionsincollectionview: (Uicollectionview *) CollectionView
34. {
36. return 1;
38. }
40. What each Uicollectionview shows
42. -(Uicollectionviewcell *) CollectionView: (Uicollectionview *) CollectionView Cellforitematindexpath: (NSIndexPath *) Indexpath
44. {
46. Registering with Collectioncell, loading views through xib files
48. [Self.collectioncell registernib:[uinib nibwithnibname:@ "MyCell" Bundle:nil]
50. forcellwithreuseidentifier:@ "MyCell"];
52. Collectionviewcell *cell = (Collectionviewcell *) [CollectionView dequeuereusablecellwithreuseidentifier:@ "MyCell" Forindexpath:indexpath];
54. Picture name
56. NSString *imagetoload = [NSString stringwithformat:@ "%ld.jpg", Indexpath.row];
58. Loading pictures
60. Cell.iamgeView.image = [UIImage imagenamed:imagetoload];
62. Set Label text
64. Cell.labeiInfo.text = [NSString stringwithformat:@ "Image%ld", Indexpath.row];
66. return cell;
68. }
70. Set each individual size
72. -(Cgsize) CollectionView: (Uicollectionview *) CollectionView layout: (uicollectionviewlayout *) collectionviewlayout Sizeforitematindexpath: (Nsindexpath *) Indexpath
74. {
76. Return Cgsizemake (170, 170);
78. }
80. Define margin for each Uicollectionview
82. -(Uiedgeinsets) CollectionView: (Uicollectionview *) CollectionView layout: (Uicollectionviewlayout *) Collectionviewlayout Insetforsectionatindex: (nsinteger) Section
84. {
86. Return Uiedgeinsetsmake (5, 5, 5, 5);
88. }
90. method to invoke when Uicollectionview is selected
92. -(void) CollectionView: (Uicollectionview *) CollectionView Didselectitematindexpath: (Nsindexpath *) IndexPath
94. {
96. Uicollectionviewcell * Cell = (Uicollectionviewcell *) [CollectionView Cellforitematindexpath:indexpath];
98. Cell.backgroundcolor = [Uicolor Whitecolor];
100. }
102. Returns whether this Uicollectionview can be selected
104. -(BOOL) CollectionView: (Uicollectionview *) CollectionView Shouldselectitematindexpath: (Nsindexpath *) IndexPath
106. {
108. return YES;
110. }
112. Hide the status bar
114. -(BOOL) Prefersstatusbarhidden
116. {
118. return YES;
120. }
122. @end

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CollectionView's case