如何设置搜索栏(如便笺应用程序)的背景图像或清除背景?
我只是想出了一个效果很好的解决方案。您必须覆盖UISearchBar,然后同时隐藏Background和Segment Control图层。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
希望这可以帮助!
面向未来的方法:
[searchBar setBackgroundImage:[UIImage new]];
[searchBar setTranslucent:YES];
mj_有我使用的答案。我只是想这样评论,但我还不能。因此,我将在实现中发布自己的答案,在其中将搜索栏添加到具有半透明BG的表格视图的顶部。
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;
}
}
我上面的答案有问题。我使用了以下内容。
for (UIView *subview in searchBar.subviews) {
if ([subview isKindOfClass:NSClassFromString(@"UISearchBarBackground")]) {
[subview removeFromSuperview];
break;
}
}
这对我有用(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;
}
}
}
您在这里有两个问题:
1.UISearchBar的背景色清晰:
请在此处查看我的答案
2.设置背景图片解决方案:(如果您使用的是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。
希望这可以帮助。
我更喜欢将alpha设置为0,以便您可以按需隐藏/显示。
// Hide
[[self.theSearchBar.subviews objectAtIndex:0] setAlpha:0.0];
// Show
[[self.theSearchBar.subviews objectAtIndex:0] setAlpha:1.0];
如何在UISearchBar中设置背景颜色:
#import <QuartzCore/QuartzCore.h>
然后与搜索栏建立出口连接(例如objSearchbar
),并使用以下几行:
for (UIView *subview in self.objSearchbar.subviews)
{
if ([subview isKindOfClass:NSClassFromString(@"UISearchBarBackground")])
{
[subview removeFromSuperview];
break;
}
}
self.tweetSearchbar.layer.backgroundColor = [UIColor blueColor].CGColor;
searchBar.searchBarStyle = UISearchBarStyleMinimal;
在这里查看:UISearchbar背景图片更改
随着iOS8 sdks苹果移至@“ UISearchBarBackground”视图更深的一层,因此必须将子视图的子视图视为波纹管,
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
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];
一班轮:
[[self.theSearchBar.subviews objectAtIndex:0] removeFromSuperview];
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文章标签:ios , uisearchbar
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文章标签:ios , uisearchbar
版权声明:本文为原创文章,版权归 admin 所有,欢迎分享本文,转载请保留出处!
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