因?yàn)閕Phone手機(jī)采用的觸摸涉及，本身沒(méi)有硬件鍵盤，一般都是點(diǎn)擊輸入框之后，彈出一個(gè)虛擬鍵盤出來(lái)，因此在iPhone開發(fā)中，經(jīng)常在完成編輯輸入之后，要寫程序代碼來(lái)關(guān)閉軟鍵盤的輸出，非常繁瑣，當(dāng)然關(guān)閉軟鍵盤的方式有很多，比如放一個(gè)按鈕在底層，通過(guò)點(diǎn)擊屏幕的空白處來(lái)關(guān)閉鍵盤;也可以處理Return鍵盤事件來(lái)關(guān)閉鍵盤，這些暫且不說(shuō)，本文要分享的是一個(gè)鍵盤頂部工具條的類，通過(guò)這個(gè)工具條，可以很方便的關(guān)閉鍵盤，而且有上一項(xiàng)，下一項(xiàng)的輸入框切換，非常方便，效果請(qǐng)看下圖：
類文件如下：
KeyBoardTopBar.h
//
// KeyBoardTopBar.h
//
//
// Created by walkman on 10-12-2.
// Copyright 2010 手機(jī)主題 http://www.shouji138.com All rights reserved.
//
#import
@interface KeyBoardTopBar : NSObject {
UIToolbar *view;//工具條
NSArray *TextFields;//輸入框數(shù)組
BOOL allowShowPreAndNext;//是否顯示上一項(xiàng)下一項(xiàng)
BOOL isInNavigationController;//是否在導(dǎo)航視圖中
UIBarButtonItem *prevButtonItem;//上一項(xiàng)按鈕
UIBarButtonItem *nextButtonItem;//下一項(xiàng)按鈕
UIBarButtonItem *hiddenButtonItem;//隱藏按鈕
UIBarButtonItem *spaceButtonItem;//空白按鈕
UITextField *currentTextField;//當(dāng)前輸入框
}
@property(nonatomic,retain) UIToolbar *view;
-(id)init; //初始化
-(void)setAllowShowPreAndNext:(BOOL)isShow; //設(shè)置是否顯示上一項(xiàng)下一項(xiàng)
-(void)setIsInNavigationController:(BOOL)isbool; //設(shè)置是否在導(dǎo)航視圖中
-(void)setTextFieldsArray:(NSArray *)array; //設(shè)置輸入框數(shù)組
-(void)ShowPrevious; //顯示上一項(xiàng)
-(void)ShowNext; //顯示下一項(xiàng)
-(void)ShowBar:(UITextField *)textField; //顯示工具條
-(void)HiddenKeyBoard; //隱藏鍵盤
@end
KeyBoardTopBar.m 文件
//
// KeyBoardTopBar.m
//
// Created by walkman on 10-12-2.
// Copyright 2010 手機(jī)主題下載 http://www.shouji138.com All rights reserved.
//
#import "KeyBoardTopBar.h"
@implementation KeyBoardTopBar
@synthesize view;
//初始化控件和變量
-(id)init{
if(self = [super init]) {
prevButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"上一項(xiàng)" style:UIBarButtonItemStyleBordered target:self action:@selector(ShowPrevious)];
nextButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"下一項(xiàng)" style:UIBarButtonItemStyleBordered target:self action:@selector(ShowNext)];
hiddenButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"隱藏鍵盤" style:UIBarButtonItemStyleBordered target:self action:@selector(HiddenKeyBoard)];
spaceButtonItem = [[UIBarButtonItem alloc]initWithBarButtonSystemItem: UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
view = [[UIToolbar alloc] initWithFrame:CGRectMake(0,480,320,44)];
view.barStyle = UIBarStyleBlackTranslucent;
view.items = [NSArray arrayWithObjects:prevButtonItem,nextButtonItem,spaceButtonItem,hiddenButtonItem,nil];
allowShowPreAndNext = YES;
TextFields = nil;
isInNavigationController = YES;
currentTextField = nil;
}
return self;
}
//設(shè)置是否在導(dǎo)航視圖中
-(void)setIsInNavigationController:(BOOL)isbool{
isInNavigationController = isbool;
}
//顯示上一項(xiàng)
-(void)ShowPrevious{
if (TextFields==nil) {
return;
}
NSInteger num = -1;
for (NSInteger i=0; i<[TextFields count]; i++) {
if ([TextFields objectAtIndex:i]==currentTextField) {
num = i;
break;
}
}
if (num>0){
[[TextFields objectAtIndex:num] resignFirstResponder];
[[TextFields objectAtIndex:num-1 ] becomeFirstResponder];
[self ShowBar:[TextFields objectAtIndex:num-1]];
}
}
//顯示下一項(xiàng)
-(void)ShowNext{
if (TextFields==nil) {
return;
}
NSInteger num = -1;
for (NSInteger i=0; i<[TextFields count]; i++) {
if ([TextFields objectAtIndex:i]==currentTextField) {
num = i;
break;
}
}
if (num<[TextFields count]-1){
[[TextFields objectAtIndex:num] resignFirstResponder];
[[TextFields objectAtIndex:num+1] becomeFirstResponder];
[self ShowBar:[TextFields objectAtIndex:num+1]];
}
}
//顯示工具條
-(void)ShowBar:(UITextField *)textField{
currentTextField = textField;
if (allowShowPreAndNext) {
[view setItems:[NSArray arrayWithObjects:prevButtonItem,nextButtonItem,spaceButtonItem,hiddenButtonItem,nil]];
}
else {
[view setItems:[NSArray arrayWithObjects:spaceButtonItem,hiddenButtonItem,nil]];
}
if (TextFields==nil) {
prevButtonItem.enabled = NO;
nextButtonItem.enabled = NO;
}
else {
NSInteger num = -1;
for (NSInteger i=0; i<[TextFields count]; i++) {
if ([TextFields objectAtIndex:i]==currentTextField) {
num = i;
break;
}
}
if (num>0) {
prevButtonItem.enabled = YES;
}
else {
prevButtonItem.enabled = NO;
}
if (num<[TextFields count]-1) {
nextButtonItem.enabled = YES;
}
else {
nextButtonItem.enabled = NO;
}
}
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.3];
if (isInNavigationController) {
view.frame = CGRectMake(0, 201-40, 320, 44);
}
else {
view.frame = CGRectMake(0, 201, 320, 44);
}
[UIView commitAnimations];
}
//設(shè)置輸入框數(shù)組
-(void)setTextFieldsArray:(NSArray *)array{
TextFields = array;
}
//設(shè)置是否顯示上一項(xiàng)和下一項(xiàng)按鈕
-(void)setAllowShowPreAndNext:(BOOL)isShow{
allowShowPreAndNext = isShow;
}
//隱藏鍵盤和工具條
-(void)HiddenKeyBoard{
if (currentTextField!=nil) {
[currentTextField resignFirstResponder];
}
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.3];
view.frame = CGRectMake(0, 480, 320, 44);
[UIView commitAnimations];
}
//釋放
- (void)dealloc {
[view release];
[TextFields release];
[prevButtonItem release];
[nextButtonItem release];
[hiddenButtonItem release];
[currentTextField release];
[spaceButtonItem release];
[super dealloc];
}
@end
下面是使用這個(gè)類的代碼：
在UIViewController頭文件中申明，并定義，并且實(shí)現(xiàn)UITextFieldDelegate代理
比如：在keyboardtopbarViewController.h文件，我是這樣寫的
//
// keyboardtopbarViewController.h
// keyboardtopbar
//
// Created by walkman on 10-12-2.
// Copyright 2010 手機(jī)主題 http://www.shouji138.com All rights reserved.
//
#import
@class KeyBoardTopBar;
@interface keyboardtopbarViewController : UIViewController {
UITableView *tableview;
NSMutableArray *cellsTextArray;
NSMutableArray *editFieldArray;
UIButton *btnReg;
KeyBoardTopBar *keyboardbar;
CGRect rect;
}
在在UIViewController的m文件中，初始化，并添加到view中
- (void)viewDidLoad {
[super viewDidLoad];
......
//其中editFieldArray 是UITextField數(shù)組，在上面已經(jīng)初始化，并添加了N個(gè)UITextField在里面。
//具體的代碼請(qǐng)下載附件查看，這里只貼出了相關(guān)的代碼
keyboardbar = [[KeyBoardTopBar alloc]init];
[keyboardbar setAllowShowPreAndNext:YES];
[keyboardbar setIsInNavigationController:NO];
[keyboardbar setTextFieldsArray:editFieldArray];
[self.view addSubview:keyboardbar.view];
}
//這個(gè)方法是UITextFieldDelegate代理中的方法，表示輸入框開始處于編輯狀態(tài)。
- (void)textFieldDidBeginEditing:(UITextField *)textField{
[keyboardbar ShowBar:textField]; //顯示工具條
......
}
OK了，調(diào)用起來(lái)還是很方便吧，當(dāng)然，這個(gè)類還有需要完善的地方，比如，在執(zhí)行了HiddenKeyBoard方法隱藏了鍵盤和工具條之后，如果在調(diào)用頁(yè)面時(shí)候需要再做進(jìn)一步處理，目前是無(wú)法實(shí)現(xiàn)的，等下一個(gè)版本中再加入一個(gè)Delegate類。