UISearchBar相关

1，背景色的去除

从以上可以看出，在iOS7.0之前，UISearchbar视图里直接包含UISearchBarBackground和UISearchBarTextField两个视图，在iOS7.0及之后，UISearchbar视图里包含的是一个UIView视图，UIView视图里才是UISearchBarBackground和UISearchBarTextField两个视图。经多次试验，发现去除UISearchbar视图里的UISearchBarBackground后UISearchbar的背景就透明了，代码如下：

for (UIView *view in self.searchBar.subviews) {

// for before iOS7.0

if ([view isKindOfClass:NSClassFromString(@”UISearchBarBackground”)]) {

[view removeFromSuperview];

break;

}

// for later iOS7.0(include)

if ([view isKindOfClass:NSClassFromString(@”UIView”)] && view.subviews.count > 0) {

[[view.subviews objectAtIndex:0] removeFromSuperview];

break;

}

}

以上代码在iOS5/6/7/8.0beta下测试均有效，希望对需要使用UISearchBar的人有帮助。

2，输入长度的限制

- (void)searchBar:(UISearchBar )searchBar textDidChange:(NSString )searchText

{

NSString *inputStr = searchText;

if ([inputStr length] > 20)

{

[self.searchDisplayController.searchBar setText:[inputStr substringToIndex:20]];

}

}

3，取消按钮的修改

(1)遍历

for (UIView *view in [[_searchBar.subviews lastObject] subviews]) {

if ([view isKindOfClass:[UIButton class]]) {

UIButton cancelBtn = (UIButton )view;

[cancelBtn setTitle:@”搜索” forState:UIControlStateNormal];

}

}

(2)直接查找的方法

//设置取消按钮的颜色

UIButton * cancelButton = [searchBar valueForKey:@”_cancelButton”];

[cancelButton setTitleColor:WESTARS_COLOR_COMMONSKIN(1.0) forState:UIControlStateDisabled];

4，输入框的修改

(1)遍历

for (UIView* subview in [[self.searchBar.subviews lastObject] subviews]) {

if ([subview isKindOfClass:[UITextField class]]) {

UITextField textField = (UITextField)subview;

[textField setBackgroundColor:[UIColor redColor]];

}

}

(2)直接查找的方法

//设置输入框的颜色

UITextField *searchField = [searchBar valueForKey:@”_searchField”];

searchField.backgroundColor = WESTARS_COLOR_BACKGROUND(1.0);