UISearchBar：清除背景颜色或设置背景图片

Question

如何设置背景图像或清除搜索栏的背景，如便条应用程序？

Answer 1

我刚想出了一个很好的解决方案。您必须重写UISearchBar，然后隐藏Background和Segment Control层。然后绘制背景。

@ .M

#import "UISearchBar.h" 
#import <QuartzCore/QuartzCore.h> 

@implementation UISearchBar(CustomBackground) 

- (id)init 
    { 
     for (UIView * subview in self.subviews) 
     { 
      if ([subview isKindOfClass:NSClassFromString(@"UISearchBarBackground") ]) 
       subview.alpha = 0.0; 

      if ([subview isKindOfClass:NSClassFromString(@"UISegmentedControl") ]) 
       subview.alpha = 0.0; 
     } 

     return self; 
    } 

+ (UIImage *) bgImagePortrait 
    { 
     static UIImage *image = nil; 
     if (image == nil) 
      image = [[UIImage imageNamed:@"UISearchBarBack.png"] retain ]; 

     return image; 
    } 

+ (UIImage *) bgImageLandscape 
    { 
     static UIImage *image = nil; 
     if (image == nil) 
      image = [[UIImage imageNamed:@"UISearchBarBack.png"] retain]; 

     return image; 
    } 

- (void) drawLayer:(CALayer *)layer inContext:(CGContextRef)contenxt 
    { 
     if ([self isMemberOfClass:[UISearchBar class]] == NO) 
      return; 

     UIImage * image = (self.frame.size.width > 320) ? [UISearchBar bgImageLandscape ] : [UISearchBar bgImagePortrait ]; 

     for (UIView * subview in self.subviews) { 
      if ([subview isKindOfClass:NSClassFromString(@"UISearchBarBackground") ]) 
       subview.alpha = 0.0; 

      if ([subview isKindOfClass:NSClassFromString(@"UISegmentedControl") ]) 
       subview.alpha = 0.0; 
     } 

     CGContextTranslateCTM(contenxt , 0 , image.size.height); 
     CGContextScaleCTM(contenxt, 1.0, -1.0); 
     CGContextDrawImage(contenxt , CGRectMake(0 , 0 , image.size.width , image.size.height), image.CGImage); 
    } 

@end 

@ .H

#import <Foundation/Foundation.h> 
#import <QuartzCore/QuartzCore.h> 


@interface UISearchBar(CustomBackground) 

@end 

希望这有助于！

Answer 2

看看这里：UISearchbar background image change

Answer 3

我有问题瓦特/以上问题的答案。我使用了以下内容。

for (UIView *subview in searchBar.subviews) { 
    if ([subview isKindOfClass:NSClassFromString(@"UISearchBarBackground")]) { 
     [subview removeFromSuperview]; 
     break; 
    } 
} 

Answer 4

mj_有我使用的答案。我只是想评论，但我还不能。所以我只会发布我自己的答案，在我的实现中，我将一个搜索栏添加到具有半透明BG的表视图的顶部。

DLog(@" Add search bar to table view"); 

//could be a UIImageView to display an image..? 
bg = [[[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 45)] autorelease]; 
bg.backgroundColor  = [UIColor blackColor]; 
UISearchBar *sb   = [[[UISearchBar alloc]initWithFrame:CGRectMake(0, 0, 290, 45)] autorelease]; 
sb.barStyle    = UIBarStyleBlackTranslucent; 
sb.showsCancelButton  = NO; 
sb.autocorrectionType  = UITextAutocorrectionTypeNo; 
sb.autocapitalizationType = UITextAutocapitalizationTypeNone; 
sb.delegate    = self; 
[bg addSubview:sb]; 
table.tableHeaderView  = bg; 

for (UIView *subview in sb.subviews) { 
    if ([subview isKindOfClass:NSClassFromString(@"UISearchBarBackground")]) { 
     [subview removeFromSuperview]; 
     break; 
    } 
} 

Answer 5

这个工作对我（的iOS4.2 +）

// Change the search bar background 
-(void)viewWillAppear:(BOOL)animated { 
    for (UIView *subview in self.searchBar.subviews) { 
     if ([subview isKindOfClass:NSClassFromString(@"UISearchBarBackground")]) { 
      UIView *bg = [[UIView alloc] initWithFrame:subview.frame]; 
      bg.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"search_bar_bg"]]; 
      [self.searchBar insertSubview:bg aboveSubview:subview]; 
      [subview removeFromSuperview]; 
      break; 
     } 
    } 
} 

Answer 6

设置背景图片

UIImageView *backgroundView = [[UIImageView alloc] initWithFrame:searchBar.bounds]; 
    backgroundView.image = [UIImage imageNamed:@"xxxx.png"]; 
    [searchBar insertSubview:backgroundView atIndex:1]; // at index 1 but not 0 
    [backgroundView release]; 

Answer 7

一个内胆：

[[self.theSearchBar.subviews objectAtIndex:0] removeFromSuperview]; 

Answer 8

我更愿意只设置alpha为0所以你可以隐藏/显示需求。

// Hide 
[[self.theSearchBar.subviews objectAtIndex:0] setAlpha:0.0]; 

// Show 
[[self.theSearchBar.subviews objectAtIndex:0] setAlpha:1.0]; 

Answer 9

如何设置的UISearchBar背景色：

#import <QuartzCore/QuartzCore.h> 

然后再做一个出口连接到搜索栏（比如，objSearchbar），并使用这些行：

for (UIView *subview in self.objSearchbar.subviews) 
{ 
    if ([subview isKindOfClass:NSClassFromString(@"UISearchBarBackground")]) 
    { 
     [subview removeFromSuperview]; 
     break; 
    } 
} 

self.tweetSearchbar.layer.backgroundColor = [UIColor blueColor].CGColor; 

Answer 10

你有这里有两个问题：
1.UISearchBar清除背景颜色：
See my answer here

2.设置背景图片 解决方案:(如果你在安装iOS 5.0 +）

[[UISearchBar appearance]setSearchFieldBackgroundImage:[navBarGradImage resizableImageWithCapInsets:inset2] forState:UIControlStateNormal]; 

注意：您也可以尝试使用透明图像作为背景。

希望这会有所帮助。

Answer 11

面向未来的方式：

[searchBar setBackgroundImage:[UIImage new]]; 
[searchBar setTranslucent:YES]; 

Answer 12

搜索栏。searchBarStyle = UISearchBarStyleMinimal;

Answer 13

与iOS8上的SDK苹果移动@“UISearchBarBackground”视图更深一层，于是纷纷将需要看的儿童意见波纹管子视图，

for (UIView *subview in searchBar.subviews) { 
     for(UIView* grandSonView in subview.subviews){ 
      if ([grandSonView isKindOfClass:NSClassFromString(@"UISearchBarBackground")]) { 
       grandSonView.alpha = 0.0f; 
      }else if([grandSonView isKindOfClass:NSClassFromString(@"UISearchBarTextField")]){ 
       NSLog(@"Keep textfiedld bkg color"); 
      }else{ 
       grandSonView.alpha = 0.0f; 
      } 
     }//for cacheViews 
    }//subviews