使用约束在UINavigationBar中添加UISearchBar

Question

所有，

我想将UISearchBar添加到UINavigationbar，我不想以编程方式使用UISearchController，Just UISearchbar，它也必须在横向上工作。

我试过它在Portrait中运行良好，但在Landscape中，我在iPhone X宽度方面存在问题。我们可以使用约束吗？

下面是代码

 CGFloat width = [UIScreen mainScreen].bounds.size.width;
    search = [[UISearchBar alloc] initWithFrame:CGRectMake(0, 0, width - 2 * 44 - 2 * 15, 44)];
    search.delegate = self; //    search.tintColor = [UIColor redColor];
    search.searchBarStyle = UISearchBarStyleMinimal;
    search.placeholder = @"Search";
    search.translucent = NO;
    search.opaque = NO;
    search.showsCancelButton = NO;
    [search setBackgroundImage:[[UIImage alloc] init]];

    //customize textfield inside UISearchBar
    @try {
        for (id object in [[[search subviews] firstObject] subviews])
        {
            if (object && [object isKindOfClass:[UITextField class]])
            {
                UITextField *textFieldObject = (UITextField *)object;
                textFieldObject.backgroundColor = [UIColor whiteColor];
                textFieldObject.borderStyle = UITextBorderStyleRoundedRect;
                textFieldObject.layer.borderColor = (__bridge CGColorRef _Nullable)([brandingObj getValueForKey:navBarTitleColor]);
                textFieldObject.layer.borderWidth = 1.0;
                break;
            }
        }
    }
    @catch (NSException *exception) {
        NSLog(@"Error while customizing UISearchBar");
    }
    @finally {

    }

Answer 1

我不明白你为什么要使用UISearchDisplayController，它的高度可配置和苹果推荐，使用几何（CGRecr，CGFrame等）调整UIKit对象布局可能很痛苦，使用自动布局避免UIKits便利初始化器，到调整后来的约束。

无论如何，如果你想用这种方式明确地做，这应该工作。

#import "ViewController.h"

@interface ViewController ()<UISearchBarDelegate>
    @property UISearchBar *searchbar;
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    _searchbar = [UISearchBar new];
    _searchbar.delegate = self;
    _searchbar.searchBarStyle = UISearchBarStyleMinimal;

    self.navigationItem.titleView = self.searchbar;
    // Do any additional setup after loading the view, typically from a nib.
}

也许你应该需要配置外观，看看here

干杯。