我如何通过iPhone键盘上的“下一步”按钮浏览所有的文本字段?
最后一个文本字段应该关闭键盘。
我已经设置了IB按钮(下一步/完成),但现在我卡住了。
我实现了textFieldShouldReturn动作,但现在下一步和完成按钮关闭键盘。
我如何通过iPhone键盘上的“下一步”按钮浏览所有的文本字段?
最后一个文本字段应该关闭键盘。
我已经设置了IB按钮(下一步/完成),但现在我卡住了。
我实现了textFieldShouldReturn动作,但现在下一步和完成按钮关闭键盘。
当前回答
我已经实现了在视图层次结构中通过Responders导航的动态解决方案。其思想是,在整个层次结构中搜索下一个可能的响应器,根据需要向前或向后搜索。
UIView搜索扩展:
UIView+Cat.h
- (UIResponder *)getNextFirstResponder;
- (UIResponder *)getPreviousFirstResponder;
UIView+Cat.m
- (UIResponder *)getPreviousFirstResponder {
if (!self.superview) {
return nil;
}
BOOL hasreachedself = NO;
for (NSInteger i = self.superview.subviews.count-1; i >= 0; i--) {
UIView *v = [self.superview.subviews objectAtIndex:i];
if (v == self) {
hasreachedself = YES;
continue;
}
if (!hasreachedself) continue;
if ([v canBecomeFirstResponder] && !v.hidden) {
return v;
}
UIResponder *subResponder = [self getNextFirstResponderInView:v];
if (subResponder) {
return subResponder;
}
}
//search hierachicaly in superviews
return [self.superview getPreviousFirstResponder];
}
- (UIResponder *)getNextFirstResponder {
if (!self.superview) {
return nil;
}
BOOL hasreachedself = NO;
for (UIView *v in self.superview.subviews) {
if (v == self) {
hasreachedself = YES;
continue;
}
if (!hasreachedself) continue;
if ([v canBecomeFirstResponder] && !v.hidden) {
return v;
}
UIResponder *subResponder = [self getNextFirstResponderInView:v];
if (subResponder) {
return subResponder;
}
}
//search hierachicaly in superviews
return [self.superview getNextFirstResponder];
}
- (UIResponder *)getNextFirstResponderInView:(UIView *)view {
if ([view canBecomeFirstResponder] && !view.hidden) {
return view;
}
for (UIView *v in view.subviews) {
UIResponder *subResponder = [self getNextFirstResponderInView:v];
if (subResponder) {
return subResponder;
}
}
return nil;
}
用法:添加UIToolbar到UITextField / UITextView(在类别或子类中):
- (void)addToolbarInputAccessoryView {
UIToolbar *toolbar = [[UIToolbar alloc] initWithFrame:CGRectZero];
UIBarButtonItem *prev = [[UIBarButtonItem alloc] initWithImage:[UIImage systemImageNamed:@"chevron.up"] style:UIBarButtonItemStylePlain target:self action:@selector(moveToPreviousFirstResponder)];
UIBarButtonItem *next = [[UIBarButtonItem alloc] initWithImage:[UIImage systemImageNamed:@"chevron.down"] style:UIBarButtonItemStylePlain target:self action:@selector(moveToNextFirstResponder)];
UIBarButtonItem *space = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
UIBarButtonItem *done = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(hideKeyboard)];
toolbar.items = @[prev, next, space, done];
if ([[UITextField appearance] keyboardAppearance] == UIKeyboardAppearanceDark) {
toolbar.barStyle = UIBarStyleBlack;
toolbar.translucent = YES;
[toolbar setBarTintColor:[UIColor blackColor]];
[toolbar setTintColor:[UIColor whiteColor]];
}
[toolbar sizeToFit];
self.inputAccessoryView = toolbar;
}
- (void)hideKeyboard {
[self resignFirstResponder];
}
- (void)moveToNextFirstResponder {
UIResponder *next = [self getNextFirstResponder];
if (next) {
[next becomeFirstResponder];
}
else {
[self resignFirstResponder];
}
}
- (void)moveToPreviousFirstResponder {
UIResponder *prev = [self getPreviousFirstResponder];
if (prev) {
[prev becomeFirstResponder];
}
else {
[self resignFirstResponder];
}
}
其他回答
当按下“Done”按钮时,一个非常简单的方法是:
在头文件中创建一个新的IBAction
- (IBAction)textFieldDoneEditing:(id)sender;
在实现文件(。M文件)添加如下方法:
- (IBAction)textFieldDoneEditing:(id)sender
{
[sender resignFirstResponder];
}
然后,当你来链接IBAction到文本框-链接到'Did End On Exit'事件。
解决方案在Swift 3.1,连接你的文本字段IBOutlets设置你的文本字段委托在viewDidLoad,然后在textFieldShouldReturn导航你的动作
class YourViewController: UIViewController,UITextFieldDelegate {
@IBOutlet weak var passwordTextField: UITextField!
@IBOutlet weak var phoneTextField: UITextField!
override func viewDidLoad() {
super.viewDidLoad()
self.passwordTextField.delegate = self
self.phoneTextField.delegate = self
// Set your return type
self.phoneTextField.returnKeyType = .next
self.passwordTextField.returnKeyType = .done
}
func textFieldShouldReturn(_ textField: UITextField) -> Bool{
if textField == self.phoneTextField {
self.passwordTextField.becomeFirstResponder()
}else if textField == self.passwordTextField{
// Call login api
self.login()
}
return true
}
}
大家好,请看这个
- (void)nextPrevious:(id)sender
{
UIView *responder = [self.view findFirstResponder];
if (nil == responder || ![responder isKindOfClass:[GroupTextField class]]) {
return;
}
switch([(UISegmentedControl *)sender selectedSegmentIndex]) {
case 0:
// previous
if (nil != ((GroupTextField *)responder).previousControl) {
[((GroupTextField *)responder).previousControl becomeFirstResponder];
DebugLog(@"currentControl: %i previousControl: %i",((GroupTextField *)responder).tag,((GroupTextField *)responder).previousControl.tag);
}
break;
case 1:
// next
if (nil != ((GroupTextField *)responder).nextControl) {
[((GroupTextField *)responder).nextControl becomeFirstResponder];
DebugLog(@"currentControl: %i nextControl: %i",((GroupTextField *)responder).tag,((GroupTextField *)responder).nextControl.tag);
}
break;
}
}
我在我的故事板中有大约10+ UITextField,我启用下一个功能的方式是通过创建一个UITextField数组,并使下一个UITextField成为firstResponder。下面是实现文件:
#import "RegistrationTableViewController.h"
@interface RegistrationTableViewController ()
@property (weak, nonatomic) IBOutlet UITextField *fullNameTextField;
@property (weak, nonatomic) IBOutlet UITextField *addressTextField;
@property (weak, nonatomic) IBOutlet UITextField *address2TextField;
@property (weak, nonatomic) IBOutlet UITextField *cityTextField;
@property (weak, nonatomic) IBOutlet UITextField *zipCodeTextField;
@property (weak, nonatomic) IBOutlet UITextField *urlTextField;
@property (weak, nonatomic) IBOutlet UITextField *usernameTextField;
@property (weak, nonatomic) IBOutlet UITextField *emailTextField;
@property (weak, nonatomic) IBOutlet UITextField *passwordTextField;
@property (weak, nonatomic) IBOutlet UITextField *confirmPWTextField;
@end
NSArray *uiTextFieldArray;
@implementation RegistrationTableViewController
- (void)viewDidLoad {
[super viewDidLoad];
NSLog(@"view did load");
uiTextFieldArray = @[self.fullNameTextField,self.addressTextField,self.address2TextField,self.cityTextField,self.zipCodeTextField,self.urlTextField,self.usernameTextField,self.emailTextField,self.passwordTextField,self.confirmPWTextField];
for(UITextField *myField in uiTextFieldArray){
myField.delegate = self;
}
}
-(BOOL)textFieldShouldReturn:(UITextField *)textField{
long index = [uiTextFieldArray indexOfObject:textField];
NSLog(@"%ld",index);
if(index < (uiTextFieldArray.count - 1)){
[uiTextFieldArray[++index] becomeFirstResponder];
}else{
[uiTextFieldArray[index] resignFirstResponder];
}
return YES;
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
if (cell == nil) { cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier]; txt_Input = [[ UITextField alloc] initWithFrame:CGRectMake(0, 10, 150, 30)]; txt_Input.tag = indexPath.row+1; [self.array_Textfields addObject:txt_Input]; // Initialize mutable array in ViewDidLoad } -(BOOL)textFieldShouldReturn:(UITextField *)textField { int tag = ( int) textField.tag ; UITextField * txt = [ self.array_Textfields objectAtIndex:tag ] ; [ txt becomeFirstResponder] ; return YES ; }