Ios6 以编程方式为UITableView和UISearchBar设置NSLayoutConstraints
我有一个Ios6 以编程方式为UITableView和UISearchBar设置NSLayoutConstraints,ios6,uiviewcontroller,modalviewcontroller,nslayoutconstraint,autolayout,Ios6,Uiviewcontroller,Modalviewcontroller,Nslayoutconstraint,Autolayout,我有一个UIViewController在它的-viewDidLoad方法中添加了一个UISearchBar和一个UITableView,作为它的视图属性的子视图。添加这些约束后,我使用可视化格式语言创建约束,如下所示: NSDictionary *views = @{@"searchBar": [_searchController searchBar], @"dataTable": [self tableView]}; NSArray *hor
UIViewController
在它的-viewDidLoad
方法中添加了一个UISearchBar
和一个UITableView
,作为它的视图
属性的子视图。添加这些约束后,我使用可视化格式语言创建约束,如下所示:
NSDictionary *views = @{@"searchBar": [_searchController searchBar],
@"dataTable": [self tableView]};
NSArray *horizontalSearchBarConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|[searchBar]|"
options:0
metrics:nil
views:views];
NSArray *horizontalDataTableConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|[dataTable]|"
options:0
metrics:nil
views:views];
NSArray *verticalSearchBarDataTableConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|[searchBar(44)][dataTable]|"
options:0
metrics:nil
views:views];
NSMutableArray *allConstraints = [NSMutableArray new];
[allConstraints addObjectsFromArray:horizontalDataTableConstraints];
[allConstraints addObjectsFromArray:horizontalSearchBarConstraints];
[allConstraints addObjectsFromArray:verticalSearchBarDataTableConstraints];
[[self view] addConstraints:allConstraints];
阅读:宽度应该是整个屏幕的宽度,搜索栏
的高度应该正好是44,数据表
的高度应该从搜索栏
的底部延伸到视图的底部
在执行此操作之前,我将这些视图的translatesAutoResizengMaskintoConstraints
设置为NO
。UIViewController
本身将显示在模式视图中。我们说的是iOS 6
我得到的是:一个空视图。纯白色
我错过了什么?我对自动布局还是个新手,试着用头脑去思考它
谢谢
更新:添加整个-viewDidLoad
- (void)viewDidLoad {
[super viewDidLoad];
BOOL translatesAutoreszingMaskIntoConstraints = NO;
[[self view] setTranslatesAutoresizingMaskIntoConstraints:translatesAutoreszingMaskIntoConstraints];
// manually create the search bar
UISearchBar *searchBar = [[UISearchBar alloc] init];
[searchBar setDelegate:self];
[searchBar setShowsCancelButton:NO];
[searchBar setTranslatesAutoresizingMaskIntoConstraints:translatesAutoreszingMaskIntoConstraints];
// create the search bar controller
_searchController = [[UISearchDisplayController alloc] initWithSearchBar:searchBar contentsController:self];
[_searchController setDelegate:self];
[[_searchController searchResultsTableView] setDelegate:self];
[_searchController setSearchResultsDataSource:self];
[_searchController setSearchResultsDelegate:self];
// add the search bar
[[self view] addSubview:[_searchController searchBar]];
// manually create the table view and add it to the view
_tableView = [[UITableView alloc] initWithFrame:CGRectZero style:UITableViewStyleGrouped];
[_tableView setBackgroundView:nil];
[_tableView setSeparatorStyle:UITableViewCellSeparatorStyleSingleLineEtched];
[_tableView setSeparatorColor:NEA_COLOR_MEDIUM_GREY];
[_tableView setBackgroundColor:NEA_COLOR_VIEW_BACKGROUND];
[_tableView setDataSource:self];
[_tableView setDelegate:self];
[_tableView setTranslatesAutoresizingMaskIntoConstraints:translatesAutoreszingMaskIntoConstraints];
[[self view] addSubview:[self tableView]];
// set up the layout using Auto Layout
NSDictionary *views = @{@"searchBar": [_searchController searchBar],
@"dataTable": [self tableView]};
NSArray *horizontalSearchBarConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|[searchBar]|"
options:0
metrics:nil
views:views];
NSArray *horizontalDataTableConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|[dataTable]|"
options:0
metrics:nil
views:views];
NSArray *verticalSearchBarDataTableConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|[searchBar(44)][dataTable]|"
options:0
metrics:nil
views:views];
NSMutableArray *allConstraints = [NSMutableArray new];
[allConstraints addObjectsFromArray:horizontalDataTableConstraints];
[allConstraints addObjectsFromArray:horizontalSearchBarConstraints];
[allConstraints addObjectsFromArray:verticalSearchBarDataTableConstraints];
[[self view] addConstraints:allConstraints];
// add our little gradient
UIImage *shadow = [UIImage imageNamed:@"searchbar_bg_shadow"];
UIImageView *shadowView = [[UIImageView alloc] initWithImage:shadow];
[shadowView setFrame:CGRectMake(0, 44, 900, 14)];
[shadowView setBackgroundColor:[UIColor clearColor]];
[shadowView setTranslatesAutoresizingMaskIntoConstraints:YES];
[[self view] addSubview:shadowView];
// add the cancel button for the search bar
UIBarButtonItem *cancelButton = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"ui_navigationbar_close"] style:UIBarButtonItemStyleBordered target:self action:@selector(cancel:)];
[[self navigationItem] setRightBarButtonItem:cancelButton];
// set a short back button title
UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:@" " style:UIBarButtonItemStyleBordered target:nil action:nil];
self.navigationItem.backBarButtonItem = backButton;
}
更新:附加信息
封装UINavigationController
是通过故事板创建的。在那里,添加了一个UIViewController
设置到我的类,因为它是rootViewController
。就这些
当我以该格式字符串手动添加宽度时,它将显示视图。因此,当我手动指定尺寸时,它就起作用了。但是,我想,我可以简单地使用框架来代替…我不知道您的问题是否得到解决,但我注意到您的代码中存在一个潜在的问题 尝试删除以下代码行:
[[self view] setTranslatesAutoresizingMaskIntoConstraints:translatesAutoreszingMaskIntoConstraints];
对于根视图,不要将该属性设置为“否” 是否添加[[self view]addSubview:[\u searchController searchBar]];[[self view]addSubview:[self tableView]];?你在控制台中有任何错误吗?是的,我像那样添加了错误,没有,不幸的是我在控制台上没有任何错误。我需要更多信息,你能分享你的代码吗?当然,更新了问题。很奇怪,但你的代码对我来说是正确的。MB您可以共享所有项目吗?还是测试?天哪…非常感谢。就这样。