输入相关关键字在百度中能搜索出来很多，但是都不靠谱，于是Google了一下，在StackOverFlow中找到一个蛮靠谱的方法，试了可行。
1.for(UIView *subviewinsearchBar.subviews) {for(UIView* grandSonViewinsubview.subviews){if([grandSonView isKindOfClass:NSClassFromString(@"UISearchBarBackground")]) {
grandSonView.alpha=0.0f;
}elseif([grandSonView isKindOfClass:NSClassFromString(@"UISearchBarTextField")] ){
NSLog(@"Keep textfiedld bkg color");
}else{
grandSonView.alpha=0.0f;
}
}//for cacheViews}//subviews
接下来，我又发现一位博主分享的文章，写的很详细，而且解决方案看起来会更加优雅，不像上面给的那样暴力粗鲁。^_^
文章在这里。
这里贴出代码：
- (void)viewDidLoad
{
[super viewDidLoad];//1UIImage* clearImg = [CDViewController imageWithColor:[UIColor clearColor] andHeight:32.0f];//2[_searchBar setBackgroundImage:clearImg];//3[_searchBar setSearchFieldBackgroundImage:clearImg forState:UIControlStateNormal];//4[_searchBar setBackgroundColor:[UIColor clearColor]];
}+ (UIImage*) imageWithColor:(UIColor*)color andHeight:(CGFloat)height
{
CGRect rect= CGRectMake(0.0f,0.0f,1.0f, height);
UIGraphicsBeginImageContext(rect.size);
CGContextRef context=UIGraphicsGetCurrentContext();
CGContextSetFillColorWithColor(context, [color CGColor]);
CGContextFillRect(context, rect);
UIImage*image =UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();returnimage;
}
修改APP内全局UISearchBar样式：
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
UIColor* myColor = [UIColor colorWithRed:0green:0.48blue:1alpha:1];//set your desired background color hereUIImage* clearImg = [CDViewController imageWithColor:[UIColor clearColor] andHeight:1.0f];
UIImage* coloredImg = [CDViewController imageWithColor:myColor andHeight:32.0f];
[[UISearchBar appearance] setBackgroundColor:[UIColor clearColor]];
[[UISearchBar appearance] setBackgroundImage:clearImg];
[[UISearchBar appearance] setSearchFieldBackgroundImage:coloredImg forState:UIControlStateNormal];returnYES;
}
给ScopeBar设置透明背景：
UIImage* clearImg = [CDViewController imageWithColor:[UIColor clearColor] andHeight:1.0f];
[_searchBar setScopeButtonTitles:nil];
[_searchBar setScopeBarBackgroundImage:clearImg];
[_searchBar setScopeBarButtonBackgroundImage:clearImg forState:UIControlStateNormal];
[_searchBar setScopeBarButtonDividerImage:clearImg forLeftSegmentState:UIControlStateNormal rightSegmentState:UIControlStateNormal];
