IOS 和 Objective C 的新手，一直在做几个教程，添加按钮、文本字段等。在 stackoverflow 上看了很多，这非常有帮助:) 现在我正在尝试在框架内创建一个集合视图，然后在它下面放一个按钮. 我可以显示一个按钮，并且我已定义要显示的集合的屏幕上半部分变为黑色，而其余部分变为白色，如预期的那样。目前，该系列应该带有一个标签，告诉我手机号码，非常基本。不确定我的视图设置是否错误，或者我的 CellViews 是否有问题。我创建了一个 mainView 控制器，在其中定义了我的按钮和集合视图，如下所示： MainViewController.h：
@interface MainViewController : UIViewController <UICollectionViewDataSource, UICollectionViewDelegateFlowLayout>
@property(nonatomic, strong) IBOutlet UICollectionView *collectionView;
@property(nonatomic, strong) IBOutlet UIButton *diaryButton;
- (id)init;
我的 .m 看起来像这样：
@implementation MainViewController
@synthesize collectionView;
@synthesize diaryButton;
- (id) init {
self = [super init];
if (self) {
CGRect buttonFrame = CGRectMake(10, 250, 70, 30);
diaryButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[diaryButton setFrame:buttonFrame];
[diaryButton setTitle:@"Diary" forState:UIControlStateNormal];
UICollectionViewFlowLayout *layout = [[UICollectionViewFlowLayout alloc] init];
layout.itemSize = CGSizeMake(64.0, 64.0);
layout.minimumInteritemSpacing = 4;
layout.minimumLineSpacing = 4;
layout.scrollDirection = UICollectionViewScrollPositionCenteredVertically;
layout.sectionInset = UIEdgeInsetsMake(2.0, 2.0, 2.0, 2.0);
CGRect collectionFrame = CGRectMake(0, 0, 320, 200);
collectionView = [[UICollectionView alloc] initWithFrame:collectionFrame collectionViewLayout:layout];
[self.view addSubview:collectionView];
[self.view addSubview:diaryButton];
//[self.view setBackgroundColor:[UIColor blueColor]];
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
[self.collectionView registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:@"ID"];
}
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
return 30;
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"ID" forIndexPath:indexPath];
UILabel *label = [[UILabel alloc] initWithFrame:cell.bounds];
label.textAlignment = NSTextAlignmentCenter;
label.text = [NSString stringWithFormat:@"%d", indexPath.row];
[cell.contentView addSubview:label];
return cell;
}
/////////////////////////////////////////////////////////////////////////////////
// collection view delegate methods ////////////////////////////////////////
- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
{
NSLog(@"cell #%d was selected", indexPath.row);
}
我的 appdelegate 看起来像这样：
@synthesize mainVC;
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.mainVC = [[MainViewController alloc] init];
[self.window addSubview:mainVC.view];
//self.window.rootViewController = mainVC;
// Override point for customization after application launch.
self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];
return YES;
}
任何帮助将不胜感激。