如何更改UISearchBar以将搜索图标替换为文本框内的文本。

Question

我有一个UISearchBar，想要移除搜索标记(放大镜图标)，并将其替换为文本

- Omar Freewan

Answer 1

你可以使用UIAppearance方法。

Swift 3.0

UISearchBar.appearance().setImage(UIImage(named: "image_name"), for: .search, state: .normal)

Objective-c

[[UISearchBar appearance] setImage:[UIImage imageNamed:@"image_name"] forSearchBarIcon:UISearchBarIconSearch state:UIControlStateNormal]; 

- Ali Amin

---

真的，这应该是被接受的答案。我使用了这行代码的变体来为清除按钮设置样式。 - Luke47

Answer 2

你可以通过以下方式更改放大图标，根据你的需求进行适应：

#import <UIKit/UIKit.h>

@interface SearchBoxExperimentsViewController : UIViewController {  
    IBOutlet UISearchBar *searchBar;
}
@end 

#import "SearchBoxExperimentsViewController.h"
@interface SearchBoxExperimentsViewController (Private)
- (void)setSearchIconToFavicon;
@end

@implementation SearchBoxExperimentsViewController
- (void)viewDidLoad 
{  
    [self setSearchIconToFavicon];  
    [super viewDidLoad];
}

#pragma mark Private
- (void)setSearchIconToFavicon 
{  
    // Really a UISearchBarTextField, but the header is private.  
    UITextField *searchField = nil;  
    for (UIView *subview in searchBar.subviews) {    
        if ([subview isKindOfClass:[UITextField class]]) {      
            searchField = (UITextField *)subview;      
            break;    
        }  
    }    
    if (searchField) {      
        UIImage *image = [UIImage imageNamed: @"favicon.png"];   
        UIImageView *iView = [[UIImageView alloc] initWithImage:image];    
        searchField.leftView = iView;    
        [iView release];  
    }  
}
@end 

对我有用 :)

- Abhishek Singh

Answer 3

如果你想要更加符合API规范的方法，可以使用普通的UITextField，并使用以下代码在UITextField中添加一个标签（如果你想要移除放大镜，那么你对搜索框有什么吸引力呢？）：

UILabel *searchFieldLeftLabel = [[UILabel alloc] initWithFrame:CGRectMake(5, 0, 32, 15)];
searchFieldLeftLabel.text = @"find:";
searchFieldLeftLabel.placeholder = @"e.g. wings, Boathouse";
searchFieldLeftLabel.font = [UIFont systemFontOfSize:14];
searchFieldLeftLabel.textColor = [UIColor grayColor];
self.searchFieldLeftLabel.leftView = locationSearchFieldLeftLabel;
[searchFieldLeftLabel release];

结果是一个漂亮的文本框，看起来像这样：当您开始输入文本时，它会替换占位符，但标签仍然存在：。

- Andy Obusek

Answer 4

请查看此帖子移除UISearchbar左侧的图像。没有公共API可以更改或删除放大镜，您应该使用UITextField。

- tiguero