上面的ios 7

Question

我最近关注了一个集合视图搜索栏的git hub项目。其中有一个搜索栏，集合视图单元格。在potrait模式下运行良好。当我使用横向模式查看时，屏幕搜索栏单独显示半宽大小。这是搜索条形码。我以编程方式添加搜索栏。

注意： 我使用的部署目标7.0应该在所有版本的ios 7,8,9设备上运行。

如何使我的搜索栏宽度相同＆amp;横向模式下的全宽高度。

我的代码：

#import "CollectionViewController.h"
#import "CollectionViewCell.h"
@interface CollectionViewController ()<UISearchBarDelegate>

    @property (nonatomic,strong) NSArray        *dataSource;
    @property (nonatomic,strong) NSArray        *dataSourceForSearchResult;
    @property (nonatomic)        BOOL           searchBarActive;
    @property (nonatomic)        float          searchBarBoundsY;

    @property (nonatomic,strong) UISearchBar        *searchBar;
    @property (nonatomic,strong) UIRefreshControl   *refreshControl;

@end

@implementation CollectionViewController

static NSString * const reuseIdentifier = @"Cell";

- (void)viewDidLoad {
    [super viewDidLoad];

    // Do any additional setup after loading the view.
    // datasource used when user search in collectionView
    self.dataSourceForSearchResult = [NSArray new];

    // normal datasource
    self.dataSource =@[@"Modesto",@"Rebecka",@"Andria",@"Sergio"];

}


-(void)viewWillAppear:(BOOL)animated{
    [super viewWillAppear:animated];
    [self prepareUI];
}
-(void)dealloc{
    // remove Our KVO observer
    [self removeObservers];
}
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}


#pragma mark - actions
-(void)refreashControlAction{
    [self cancelSearching];
    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
        // stop refreshing after 2 seconds
        [self.collectionView reloadData];
        [self.refreshControl endRefreshing];
    });
}


#pragma mark - <UICollectionViewDataSource>
- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
    return 1;
}
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
    if (self.searchBarActive) {
        return self.dataSourceForSearchResult.count;
    }
    return self.dataSource.count;
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
    CollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:reuseIdentifier forIndexPath:indexPath];

    // Configure the cell
    if (self.searchBarActive) {
        cell.laName.text = self.dataSourceForSearchResult[indexPath.row];
    }else{
        cell.laName.text = self.dataSource[indexPath.row];
    }
    return cell;
}


#pragma mark -  <UICollectionViewDelegateFlowLayout>
- (UIEdgeInsets)collectionView:(UICollectionView *)collectionView
                        layout:(UICollectionViewLayout*)collectionViewLayout
        insetForSectionAtIndex:(NSInteger)section{
    return UIEdgeInsetsMake(self.searchBar.frame.size.height, 0, 0, 0);
}
- (CGSize)collectionView:(UICollectionView *)collectionView
                  layout:(UICollectionViewLayout*)collectionViewLayout
  sizeForItemAtIndexPath:(NSIndexPath *)indexPath{
    CGFloat cellLeg = (self.collectionView.frame.size.width/2) - 5;
    return CGSizeMake(cellLeg,cellLeg);;
}


#pragma mark - search
- (void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope{
    NSPredicate *resultPredicate    = [NSPredicate predicateWithFormat:@"self contains[c] %@", searchText];
    self.dataSourceForSearchResult  = [self.dataSource filteredArrayUsingPredicate:resultPredicate];
}

- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText{
    // user did type something, check our datasource for text that looks the same
    if (searchText.length>0) {
        // search and reload data source
        self.searchBarActive = YES;
        [self filterContentForSearchText:searchText
                                   scope:[[self.searchDisplayController.searchBar scopeButtonTitles]
                                          objectAtIndex:[self.searchDisplayController.searchBar
                                                         selectedScopeButtonIndex]]];
        [self.collectionView reloadData];
    }else{
        // if text lenght == 0
        // we will consider the searchbar is not active
        self.searchBarActive = NO;
    }
}

- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar{
    [self cancelSearching];
    [self.collectionView reloadData];
}
- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar{
    self.searchBarActive = YES;
    [self.view endEditing:YES];
}
- (void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar{
    // we used here to set self.searchBarActive = YES
    // but we'll not do that any more... it made problems
    // it's better to set self.searchBarActive = YES when user typed something
    [self.searchBar setShowsCancelButton:YES animated:YES];
}
- (void)searchBarTextDidEndEditing:(UISearchBar *)searchBar{
    // this method is being called when search btn in the keyboard tapped
    // we set searchBarActive = NO
    // but no need to reloadCollectionView
    self.searchBarActive = NO;
    [self.searchBar setShowsCancelButton:NO animated:YES];
}
-(void)cancelSearching{
    self.searchBarActive = NO;
    [self.searchBar resignFirstResponder];
    self.searchBar.text  = @"";
}
#pragma mark - prepareVC
-(void)prepareUI{
    [self addSearchBar];
    [self addRefreshControl];
}
-(void)addSearchBar{
    if (!self.searchBar) {
        self.searchBarBoundsY = self.navigationController.navigationBar.frame.size.height + [UIApplication sharedApplication].statusBarFrame.size.height;
        self.searchBar = [[UISearchBar alloc]initWithFrame:CGRectMake(0,self.searchBarBoundsY, [UIScreen mainScreen].bounds.size.width, 44)];
        self.searchBar.searchBarStyle       = UISearchBarStyleMinimal;
        self.searchBar.tintColor            = [UIColor whiteColor];
        self.searchBar.barTintColor         = [UIColor whiteColor];
        self.searchBar.delegate             = self;
        self.searchBar.placeholder          = @"search here";

        [[UITextField appearanceWhenContainedIn:[UISearchBar class], nil] setTextColor:[UIColor whiteColor]];

        // add KVO observer.. so we will be informed when user scroll colllectionView
        [self addObservers];
    }

    if (![self.searchBar isDescendantOfView:self.view]) {
        [self.view addSubview:self.searchBar];
    }
}

-(void)addRefreshControl{
    if (!self.refreshControl) {
        self.refreshControl                  = [UIRefreshControl new];
        self.refreshControl.tintColor        = [UIColor whiteColor];
        [self.refreshControl addTarget:self
                                action:@selector(refreashControlAction)
                      forControlEvents:UIControlEventValueChanged];
    }
    if (![self.refreshControl isDescendantOfView:self.collectionView]) {
        [self.collectionView addSubview:self.refreshControl];
    }
}
-(void)startRefreshControl{
    if (!self.refreshControl.refreshing) {
        [self.refreshControl beginRefreshing];
    }
}

#pragma mark - observer 
- (void)addObservers{
    [self.collectionView addObserver:self forKeyPath:@"contentOffset" options:NSKeyValueObservingOptionNew | NSKeyValueObservingOptionOld context:nil];
}
- (void)removeObservers{
    [self.collectionView removeObserver:self forKeyPath:@"contentOffset" context:Nil];
}
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(UICollectionView *)object change:(NSDictionary *)change context:(void *)context{
    if ([keyPath isEqualToString:@"contentOffset"] && object == self.collectionView ) {
        self.searchBar.frame = CGRectMake(self.searchBar.frame.origin.x,
                                          self.searchBarBoundsY + ((-1* object.contentOffset.y)-self.searchBarBoundsY),
                                          self.searchBar.frame.size.width,
                                          self.searchBar.frame.size.height);
    }
}

此处获取完整项目Git-hub

此处为肖像模式图像：

当我在风景海上 rch酒吧跑步时，这个搜索栏就像这样：

我需要添加哪些代码才能在横向模式下使用全宽视图设置我的搜索栏.Thnaks！

Answer 1

我在github中使用过你的项目。让我们在横向模式下使更改工作完整搜索栏：替换下面的代码，就像在addsearchbar方法中一样：

-(void)addSearchBar{
    if (!self.searchBar) {
        self.searchBarBoundsY = self.navigationController.navigationBar.frame.size.height + [UIApplication sharedApplication].statusBarFrame.size.height;
        self.searchBar = [[UISearchBar alloc]initWithFrame:CGRectMake(0,self.searchBarBoundsY, [UIScreen mainScreen].bounds.size.width, 44)];
        self.searchBar.searchBarStyle       = UISearchBarStyleMinimal;
        self.searchBar.tintColor            = [UIColor whiteColor];
        self.searchBar.barTintColor         = [UIColor whiteColor];
        self.searchBar.delegate             = self;
        self.searchBar.placeholder          = @"search here";


     // added line-to set your screen fit and autoresizing with width and bottom margin.You can also add any position to that

        [self.searchBar sizeToFit];

        _searchBar.autoresizingMask = UIViewAutoresizingFlexibleWidth |UIViewAutoresizingFlexibleBottomMargin;

        [[UITextField appearanceWhenContainedIn:[UISearchBar class], nil] setTextColor:[UIColor whiteColor]];

        // add KVO observer.. so we will be informed when user scroll colllectionView
        [self addObservers];
    }

    if (![self.searchBar isDescendantOfView:self.view]) {
        [self.view addSubview:self.searchBar];
    }
}

希望这有帮助！

Answer 2

在加载或显示视图时尝试执行以下操作：

[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
[[NSNotificationCenter defaultCenter]
   addObserver:self selector:@selector(orientationChanged:)
   name:UIDeviceOrientationDidChangeNotification
   object:[UIDevice currentDevice]];

然后在View Controller中添加以下方法：

- (void) orientationChanged:(NSNotification *)note
{
 CGRect frame = _searchBar.frame;
frame.size.width = self.view.frame.size.width;
_searchBar.frame = frame;
}