如何更改iOS上的UISearchBar组件的内部背景颜色

1. 使用此代码改变搜索栏“UITextField将backgroundImageUITextField *searchField;
NSUInteger numViews = [searchBar.subviews count];
for(int i = 0; i < numViews; i++) {
if([[searchBar.subviews objectAtIndex:i] isKindOfClass:[UITextField class]]) { //conform?
searchField = [searchBar.subviews objectAtIndex:i];
}
}
if(!(searchField == nil)) {
searchField.textColor = [UIColor whiteColor];
[searchField setBackground: [UIImage imageNamed:@"yourImage"]];//just add here gray image which you display in quetion
[searchField setBorderStyle:UITextBorderStyleNone];
}

该波纹管代码的变化UISearchBarIcon UIImageView *searchIcon = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"yourSearchBarIconImage"]];
searchIcon.frame = CGRectMake(10, 10, 24, 24);
[searchBar addSubview:searchIcon];
[searchIcon release];

也为改变searcBar图标搜索栏的你哪些可用的iOS 5 +- (void)setImage:(UIImage *)iconImage forSearchBarIcon:(UISearchBarIcon)icon state:(UIControlState)state

在这里你可以设置4种UISearchBarIcon即UISearchBarIconBookmarkUISearchBarIconClearUISearchBarIconResultsListUISearchBarIconSearch我希望这可以帮助您... 

2. 根据的UISearchBar 你这个函数适用于iOS 5.0 +。- (void)setSearchFieldBackgroundImage:(UIImage *)backgroundImage forState:(UIControlState)state

用例：[mySearchBar setSearchFieldBackgroundImage:myImage forState:UIControlStateNormal];

可悲的是，在iOS 4的你需要恢复到较少见其他的答案。 

3. 只是自定义文本字段本身。 我只是这样做的，它工作正常（的iOS 7）。UITextField *txfSearchField = [_searchBar valueForKey:@"_searchField"];
txfSearchField.backgroundColor = [UIColor redColor];

这样，您就不需要创建一个图像，它的大小，等.. 

4. 对于只改变颜色：searchBar.tintColor = [UIColor redColor];

为应用背景图像：[self.searchBar setSearchFieldBackgroundImage:
[UIImage imageNamed:@"Searchbox.png"]
forState:UIControlStateNormal];

5. 私有API的：for (UIView* subview in [[self.searchBar.subviews lastObject] subviews]) {
if ([subview isKindOfClass:[UITextField class]]) {
UITextField *textField = (UITextField*)subview;
[textField setBackgroundColor:[UIColor redColor]];
}
}