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我有一個登錄屏幕，當用戶觸摸文本文件以輸入數據時，我想要將文本框向上移動，並在用戶觸摸屏幕上的任何位置時將文本框與鍵盤一起向下移動。如何上下移動UItexfield？
我能夠在用戶交互中移動文本字段，並且當用戶觸摸屏幕上的任何位置時我可以向下移動鍵盤，但是我無法將文本字段恢復到原始位置。
下面是我的代碼： .h文件中：
#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
this is my .m file:
// 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.");
}
/*
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Return YES for supported orientations.
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
*/
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc. that aren't in use.
}
- (void)viewDidUnload {
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (void)dealloc {
[super dealloc];
}
-(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 [email protected]"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)];
[email protected]"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)];
[email protected]"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
謝的先生，但是它不工作........，我想下移當用戶觸摸任何視圖時的文本框 – Nilesh
然後添加觸摸事件。我已經更新了代碼請看看它。 – Anand
我沒有得到你..... anandji可以請你提供我的整個代碼或任何教程........這將是有益的....謝謝 – Nilesh