如何在IOS中移除uibaritem背景镜像？

Question

您好，我使用此代码来设置我的栏按钮的背景图像。我把它放在"AppDelegate.h“中

  //-- set bar button image
    UIImage *barButtonImage = [[UIImage imageNamed:@"bar-button"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 6, 0, 6)];

    [[UIBarButtonItem appearance] setBackgroundImage:barButtonImage forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];

它工作得很好，但在我的搜索控制器中，我不想使用它，因为它使我的“搜索”按钮看起来非常丑陋。有没有办法只在搜索控制器中删除背景图像？请帮帮我。谢谢!

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Answer 1

在你的SearchController.m中尝试

[[UIBarButtonItem appearance] setBackgroundImage:nil forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];

Answer 2

[searchBarObject setImage:nil forSearchBarIcon:UISearchBarIconSearch state:UIControlStateNormal];

这对我来说很有效..我希望它能对你有所帮助。

已更新完整代码..viewDidLoad中的.m文件内容

//Table initialization..........................................................................
    my_table = [[UITableView alloc]initWithFrame:CGRectMake(0, 0, 320, self.view.frame.size.height)];

//SearchBar initialization......................................................................
UISearchBar *search = [UISearchBar new];
[search sizeToFit];
search.delegate = self;

//Make the image in size 20x20................................................................
UIImage *img = [UIImage imageNamed:@"apple.jpg"];
UIGraphicsBeginImageContextWithOptions(CGSizeMake(20, 20), YES, 0);
[img drawInRect:CGRectMake(0, 0, 20, 20)];
UIImage *img2 = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

//Set the image for the UISearchbarIconSearch...................................................
[search setImage:img2 forSearchBarIcon:UISearchBarIconSearch state:UIControlStateNormal];

search.barStyle = UIBarStyleBlackTranslucent;
[my_table setTableHeaderView:search];
[my_table reloadData];

//SearchDisplay initialization..................................................................
UISearchDisplayController *display = [[UISearchDisplayController alloc]initWithSearchBar:search contentsController:self];
sbc = display; //
display.delegate = self;
display.searchResultsDataSource = self;
display.searchResultsDelegate = self;

my_table.dataSource = self;
my_table.delegate = self;

[self.view addSubview:my_table];

.h文件。

@interface ViewController : UIViewController<UITableViewDataSource, UITableViewDelegate, UISearchBarDelegate, UISearchDisplayDelegate>

{
    NSArray *table_array;
    UITableView *my_table;
    UISearchDisplayController *sbc;
    NSArray *filtered;
}
@end

这是我的代码，它改变了搜索图标的图像...

Answer 3

如果您想要删除搜索控制器的背景图像

[[searchBar.subviews objectAtIndex:0] removeFromSuperview];

你可以给它添加清晰的背景图片。

UIImageView *searchImage=[[UIImageView alloc] initWithFrame:CGRectMake(0.0, 0.0, 319.0, 44.0)];
[searchImage setImage:[UIImage imageNamed:@"searchbg.png"]];
[searchBar insertSubview:searchImage atIndex:1];