自定义UISearchbar-iOS的UITextfield
我正在尝试为UISearchbar自定义文本字段。下图显示了我完成了一半的工作。 我对UISearchbar进行了子类化，并从视图控制器中调用了它。我正试图从文本字段中删除那些深灰色的线条。下面是添加到viewcontroller子视图的UISearchbar的实现自定义UISearchbar-iOS的UITextfield,ios,uitextfield,uisearchbar,quartz-core,Ios,Uitextfield,Uisearchbar,Quartz Core,我正在尝试为UISearchbar自定义文本字段。下图显示了我完成了一半的工作。 我对UISearchbar进行了子类化，并从视图控制器中调用了它。我正试图从文本字段中删除那些深灰色的线条。下面是添加到viewcontroller子视图的UISearchbar的实现 searchbar = [[SearchBar alloc] initWithFrame:CGRectMake(35,78, 250, 17)]; searchbar.backgroundColor = [UIColor clea
searchbar = [[SearchBar alloc] initWithFrame:CGRectMake(35,78, 250, 17)];
searchbar.backgroundColor = [UIColor clearColor];
searchbar.layer.borderColor = [[UIColor clearColor] CGColor];
searchbar.layer.borderWidth = 0;
for(UIView *view in searchbar.subviews){
if([view isKindOfClass:[UITextField class]]){
UITextField *tf= (UITextField *)view;
tf.layer.borderColor = [[UIColor clearColor] CGColor];
tf.delegate = self;
break;
}
}
[self.view addSubview:searchbar];
searchbar.delegate = self;
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
// Initialization code
}
return self;
}
-(void)layoutSubviews{
UITextField *searchField;
[[[self subviews] objectAtIndex:0] removeFromSuperview];
[self setTintColor:[UIColor clearColor]];
self.clipsToBounds = YES;
NSUInteger numViews = [self.subviews count];
for(int i = 0; i < numViews; i++) {
if([[self.subviews objectAtIndex:i] isKindOfClass:[UITextField class]]) {
searchField = [self.subviews objectAtIndex:i];
searchField.leftViewMode = UITextFieldViewModeNever;
searchField.backgroundColor = [UIColor clearColor];
}
}
if(!(searchField == nil)) {
searchField.backgroundColor = [UIColor clearColor];
searchField.textColor = [UIColor blackColor];
searchField.frame = CGRectMake(self.frame.origin.x,self.frame.origin.y,self.frame.size.width,self.frame.size.height-10);
[searchField setBorderStyle:UITextBorderStyleRoundedRect];
}
[super layoutSubviews];
}
-（id）initWithFrame:（CGRect）frame
{
self=[super initWithFrame:frame]；
如果（自我）{
//初始化代码
}
回归自我；
}
-（无效）布局子视图{
UITextField*搜索字段；
[[self subviews]objectAtIndex:0]removeFromSuperview]；
[self-setTintColor:[UIColor clearColor]]；
self.clipstobunds=是；
NSU整数numViews=[self.subviews count]；
for（int i=0；i这是一种从UISearchBar子视图层次结构获取文本字段并根据需要设置其属性的简单方法，如
UITextField *txfSearchField = [searchbar valueForKey:@"_searchField"];
[txfSearchField setBackgroundColor:[UIColor whiteColor]];
[txfSearchField setLeftView:UITextFieldViewModeNever];
[txfSearchField setBorderStyle:UITextBorderStyleRoundedRect];
txfSearchField.layer.borderWidth = 8.0f;
txfSearchField.layer.cornerRadius = 10.0f;
txfSearchField.layer.borderColor = [UIColor clearColor].CGColor;
从IOS-5开始，您拥有外观代理，请参见： （有两个部分称为“自定义外观”，请同时选中） 下面是一个工作示例，它修改了应用程序中的所有UISearchBar：
[[UISearchBar appearance] setSearchFieldBackgroundImage:[UIImage imageNamed:@"text_box"] forState:UIControlStateNormal];
[[UISearchBar appearance] setImage:[UIImage imageNamed:@"search_icon"] forSearchBarIcon:UISearchBarIconSearch state:UIControlStateNormal];
mysearchBar.tintColor = [UIColor whiteColor];
如果不想使用未记录的功能或图像，请使用以下选项：
CGSize size = CGSizeMake(30, 30);
// create context with transparent background
UIGraphicsBeginImageContextWithOptions(size, NO, 1);
// Add a clip before drawing anything, in the shape of an rounded rect
[[UIBezierPath bezierPathWithRoundedRect:CGRectMake(0,0,30,30)
cornerRadius:2.0] addClip];
[[UIColor whiteColor] setFill];
UIRectFill(CGRectMake(0, 0, size.width, size.height));
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
[self.searchBar setSearchFieldBackgroundImage:image forState:UIControlStateNormal];
实现抗更改和高性能
extension UISearchBar {
var textField:UITextField {
guard let txtField = self.value(forKey: "_searchField") as? UITextField else {
assertionFailure()
return UITextField()
}
return txtField
}
}
import UIKit
private var foundTextFieldAssociationKey = UInt8()
extension UISearchBar {
var textField: UITextField {
get {
let value = objc_getAssociatedObject(self, &foundTextFieldAssociationKey) as? UITextField
if value == nil {
let findInView = (UIView) -> UITextField? = { view in
for subview in view.subviews {
if let textField = (subview as? UITextField) ?? findInView(subview) {
return textField
}
}
return nil
}
guard let foundTextField = findInView(self) else {
fatalError("UISearchBar doesn't seem to have a UITextField anywhere in the view hierarchy")
}
textField = foundTextField
return foundTextField
}
return value!
}
set {
objc_setAssociatedObject(self, &foundTextFieldAssociationKey, newValue, objc_AssociationPolicy.OBJC_ASSOCIATION_ASSIGN)
}
}
}
如果要更改属性的名称，请确保不将其更改为searchField。这会把你的搜索栏弄得一团糟。我发现iOS 10需要这样做（从上面借来，并快速调整）
简洁明了
extension UISearchBar {
var textField:UITextField {
guard let txtField = self.value(forKey: "_searchField") as? UITextField else {
assertionFailure()
return UITextField()
}
return txtField
}
}
对于仍在寻找答案的用户，苹果在iOS 13的UISearchBar中添加了
searchTextFieldsearchTextFieldlet searchBar = UISearchBar()
var searchField : UITextField
if #available(iOS 13.0, *) {
searchField = searchBar.searchTextField
} else {
searchField = //One of the other methods listed
}
现在，在iOS 13中，您可以使用
searchTextFieldUISearchBarUITextFieldextension UISearchBar {
/// Returns the`UITextField` that is placed inside the text field.
var textField: UITextField {
if #available(iOS 13, *) {
return searchTextField
} else {
return self.value(forKey: "_searchField") as! UITextField
}
}
}
如我所说，图标是UIImageview的一部分。我担心的是文本字段。那些深灰色的线条将被删除。谢谢你的回答。图标已经从搜索栏中删除。谢谢你，我会为你付啤酒费的。谢谢！我使用它更改了使用UITextField*txfSearchField=[\u searchBar valueForKey:@“\u searchField]”进行搜索的键盘；[TXSearchField setKeyboardType:UIKeyboardTypeNumberPad]；它在iOS 13上崩溃在iOS 13中，您得到的SearchTextField是这样的：UITextField*search=searchBar.SearchTextField将self.valueForKey（“\u searchField”）返回为怎么样？UITextField？@ton有效。我怀疑苹果会在不久的将来更改密钥，但在使用黑客解决方案时，我个人更喜欢找到一种对底层实现更改有点弹性的方法。@abishek bedi我将您的更改重新编辑了一遍。我的代码很旧，但您编辑了实现的核心，并将其完全更改为其他内容。我的实现的核心在于不依赖于_searchField来抵抗核心实现的变化。嘿，这是一个很好的解决方案。苹果用新的IDE捕捉到了这个私有API