我有一个登录屏幕，我想在用户触摸textfiled输入数据时移动文本字段，并在用户触摸屏幕上的任何位置时将文本字段与键盘一起向下移动。
我可以在用户交互上移动文本字段，当用户触摸屏幕上的任何位置时我可以向下移动键盘但我无法将文本字段恢复到原始位置。
以下是我的代码： .h文件：
#import <UIKit/UIKit.h>
#import "RegistrationForm.h"
#import "sqlite3.h";
@interface VLoginViewController : UIViewController <UITableViewDelegate ,UITableViewDataSource>
{
NSDictionary *tableContents;
NSArray *textField;
UILabel *lblCompanyName;
UITextField *txtUserName;
UITextField *txtPass;
UIButton *btnLogin;
UIButton *btnSignUp;
RegistrationForm *registration;
NSString *dbPath;
sqlite3 *loginDB;
}
@property(nonatomic ,retain) NSDictionary *tableContents;
@property(nonatomic ,retain) NSArray *textField;
@property(nonatomic, retain) IBOutlet UITextField *txtUserName;
@property(nonatomic ,retain) IBOutlet UITextField *txtPass;
@property(nonatomic ,retain) UILabel *lblCompanyName;
@property(nonatomic ,retain) UIButton *btnLogin;
@property(nonatomic ,retain) UIButton *btnSignUp;
@end
这是我的.m文件：
// LoginPage.m
// MYBusinessCentral
//
// Created by Bcod Web on 09/11/11.
// Copyright 2011 __MyCompanyName__. All rights reserved.
//
#import "LoginPage.h"
#define kOFFSET_FOR_KEYBOARD 60.0
@implementation LoginPage
@synthesize imgView;
@synthesize tableContents,textField;
@synthesize txtUserName,txtPassword;
@synthesize btn_login,btn_registration;
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
NSArray *text = [[NSArray alloc]initWithObjects:@"" ,@"" ,nil];
NSDictionary *textData = [[NSDictionary alloc]initWithObjectsAndKeys:text,@"",nil];
self.tableContents = textData;
self.textField = [[self.tableContents allKeys] sortedArrayUsingSelector:@selector(compare:)];
btn_login = [UIButton buttonWithType:UIButtonTypeRoundedRect];
btn_login.frame = CGRectMake(25, 260, 270, 40);
[btn_login setBackgroundImage:[UIImage imageNamed:@""] forState:UIControlStateNormal];
[btn_login setTitle:@"login" forState:UIControlStateNormal];
[btn_login addTarget:self action:@selector(Login:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn_login];
[super viewDidLoad];
}
-(void)textFieldDidBeginEditing:(UITextField *)sender
{
if ([sender isEqual:txtUserName] && [sender isEqual:txtPassword])
{
//move the main view, so that the keyboard does not hide it.
if (self.view.frame.origin.y >= 0)
{
//[self setViewMovedUp:YES];
}
}
}
-(void)setViewMovedUp:(BOOL)movedUp
{
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.5]; // if you want to slide up the view
CGRect rect = self.view.frame;
if (movedUp)
{
// 1. move the view's origin up so that the text field that will be hidden come above the keyboard
// 2. increase the size of the view so that the area behind the keyboard is covered up.
rect.origin.y -= kOFFSET_FOR_KEYBOARD;
rect.size.height += kOFFSET_FOR_KEYBOARD;
}
else
{
// revert back to the normal state.
rect.origin.y += kOFFSET_FOR_KEYBOARD;
rect.size.height -= kOFFSET_FOR_KEYBOARD;
}
self.view.frame = rect;
[UIView commitAnimations];
}
- (void)keyboardWillShow:(NSNotification *)notif
{
//keyboard will be shown now. depending for which textfield is active, move up or move down the view appropriately
if ([txtUserName isFirstResponder] && self.view.frame.origin.y >= 0)
{
[self setViewMovedUp:YES];
}
else if ([txtPassword isFirstResponder] && self.view.frame.origin.y >=0)
{
[self setViewMovedUp:YES];
}
}
-(void)textFieldShouldReturn:(UITextField *)sender
{
if ([sender isEqual:txtUserName] && [sender isEqual:txtPassword])
{
if (self.view.frame.origin.y <=0)
{
//[self setViewMovedDown:YES];
}
}
}
-(void)setViewMovedDown:(BOOL)movedDown
{
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.5]; // if you want to slide up the view
CGRect rect = self.view.frame;
if (movedDown)
{
// revert back to the normal state.
rect.origin.y += kOFFSET_FOR_KEYBOARD;
rect.size.height -= kOFFSET_FOR_KEYBOARD;
}
self.view.frame = rect;
[UIView commitAnimations];
}
- (void)keyboardWillHide:(NSNotification *)notif
{
//keyboard will be shown now. depending for which textfield is active, move up or move down the view appropriately
if ([txtUserName isFirstResponder] && self.view.frame.origin.y <= 0)
{
[self setViewMovedDown:YES];
}
else if ([txtPassword isFirstResponder] && self.view.frame.origin.y <=0)
{
[self setViewMovedDown:YES];
}
}
- (void)viewWillAppear:(BOOL)animated
{
// register for keyboard notifications
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:)
name:UIKeyboardWillShowNotification object:self.view.window];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:)
name:UIKeyboardWillHideNotification object:self.view.window];
}
- (void)viewWillDisappear:(BOOL)animated
{
// unregister for keyboard notifications while not visible.
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillHideNotification object:nil];
}
-(void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
[txtUserName resignFirstResponder];
[txtPassword resignFirstResponder];
NSLog(@"Touches began.");
}
-(NSInteger) numberOfSectionInTableView:(UITableView *)tableView
{
return[self.textField count];
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
NSArray *lsData =[self.tableContents objectForKey:[self.textField objectAtIndex:section]];
return [lsData count];
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *TextCellIdentifier =@"Cell";
UITableViewCell *cell =[tableView dequeueReusableCellWithIdentifier:TextCellIdentifier];
if (cell==nil)
{
cell=[[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:TextCellIdentifier ] autorelease];
cell.accessoryType= UITableViewCellAccessoryNone;
cell.selectionStyle=UITableViewCellSelectionStyleNone;
}
if ([indexPath row] ==0)
{
txtUserName = [[UITextField alloc]initWithFrame:CGRectMake(12, 0, 250,20)];
txtUserName.placeholder=@"UserName";
txtUserName.autocorrectionType =UITextAutocorrectionTypeNo;
[txtUserName setClearButtonMode:UITextFieldViewModeWhileEditing];
txtUserName.keyboardType =UIKeyboardTypeEmailAddress;
txtUserName.textAlignment =UITextAlignmentLeft;
txtUserName.font=[UIFont fontWithName:@"Helvetica" size:15];
txtUserName.adjustsFontSizeToFitWidth =YES;
[txtUserName setEnabled:YES];
cell.accessoryView =txtUserName;
//[cell addSubview:txtUserName];
[txtUserName release];
}
if([indexPath row]==1)
{
txtPassword = [[UITextField alloc]initWithFrame:CGRectMake(12, 0, 250,20)];
txtPassword.placeholder=@"Password";
txtPassword.secureTextEntry =YES;
txtPassword.autocorrectionType =UITextAutocorrectionTypeNo;
[txtPassword setClearButtonMode:UITextFieldViewModeWhileEditing];
txtPassword.keyboardType =UIKeyboardTypeEmailAddress;
txtPassword.textAlignment =UITextAlignmentLeft;
txtUserName.font=[UIFont fontWithName:@"Helvetica" size:15];
txtPassword.adjustsFontSizeToFitWidth =YES;
[txtPassword setEnabled:YES];
cell.accessoryView=txtPassword;
//[cell addSubview:txtPass];
[txtPassword release];
}
return cell;
}
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[tableView deselectRowAtIndexPath:indexPath animated:YES];
}
-(IBAction)Login:(id)sender
{
}
-(IBAction)Registration:(id)sender
{
}
@end
答案 0 :(得分：1)
尝试这种方式：
设置textField 1st的委托。
-(void)textFieldDidBeginEditing:(UITextField *)textField {
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:1.5];
[textField setFrame:CGRectMake(50,50,100,40)];
[UIView commitAnimations];
}
按下键盘返回键时，将文本字段设置为原始位置。
-(BOOL)textFieldShouldReturn:(UITextField *)textField {
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:1.5];
[textField setFrame:CGRectMake(50,200,100,40)];
[UIView commitAnimations];
}
触控
-(void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
[textField resignFirstResponder];
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:1.5];
[textField setFrame:CGRectMake(50,200,100,40)];
[UIView commitAnimations];
NSLog(@"Touches began.");
}
答案 1 :(得分：0)
您可以使用两种委托方法。
1.-(void)textFieldDidBeginEditing:(UITextField *)textField
2.-(BOOL)textFieldShouldReturn:(UITextField *)textField
1.in didbegin editing
textfield.frame = CGRectMake(0,-10,100,40);
2.in shouldreturn方法
textfield.frame = CGRectMake(0,10,100,40);