自定义软键盘上的Return键的文本
#import <UIKit/UIKit.h> typedef void(^DoneActionBlock)(id); @interface CustomeTextField : UITextField @property(nonatomic,retain) UIButton* doneButton; @property(nonatomic,retain) NSString* buttonTitle; @property(nonatomic,copy) DoneActionBlock doneEven; @end
#import "CustomeTextField.h"
@implementation CustomeTextField
@synthesize doneButton,buttonTitle,doneEven;
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
// Initialization code
// 注册UIKeyboardDidShowNotification通知的观察者为self
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardDidShow:) name:UIKeyboardDidShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardDidHide:)
name:UIKeyboardDidHideNotification object:nil];
}
return self;
}
/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect
{
// Drawing code
}
*/
// 实现观察者的注册事件
-(void)keyboardDidHide:(NSNotification*)note{
if (self.doneButton) {
self.doneButton.hidden=YES;
}
}
- (void)keyboardDidShow:(NSNotification *)note {
UIWindow* tempWindow = nil;
UIView* keyboard = nil;
tempWindow = [[[UIApplication sharedApplication] windows] objectAtIndex:1];
if (tempWindow == nil)
{
return;
}
int viewCount = [tempWindow.subviews count];
////find key board view.
for(int i=0; i<viewCount; i++)
{
keyboard = [tempWindow.subviews objectAtIndex:i];
//keyboard view found; add the custom button to it
if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 3.2)
{
if(([[keyboard description] hasPrefix:@"<UIPeripheralHostView"] == YES) ||(([[keyboard description] hasPrefix:@"<UIKeyboard"] == YES)))
{
NSLog(@"find UIKeyboard or UIPeripheralHostView");
[self creatDoneButton];
[keyboard addSubview:doneButton];
break;
}
}
else
{
if([[keyboard description] hasPrefix:@"<UIKeyboard"] == YES)
{
NSLog(@"find UIKeyboard");
break;
}
}
}
}
-(void)creatDoneButton
{
// 在键盘第1次弹出时，创建按钮
if (self.doneButton == nil) {
self.doneButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
self.doneButton.hidden=YES;
//定制按钮上面要显示的文字，也可以在创建该对象时自定义，本文只自定义了按钮上面的显示文字为：buttonTitle
[self.doneButton setTitle:buttonTitle forState:UIControlStateNormal]; // 设置按钮的位置在恰当的地方
[self.doneButton setFrame:CGRectMake(773/2.0, 250/2.0, 180/2.0, 68/2.0)];
[self.doneButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
self.doneButton.titleLabel.font = [UIFont systemFontOfSize:16];
[self.doneButton setTitle:@"hello" forState:UIControlStateNormal];
// 设置按钮背景图片
[self.doneButton setBackgroundImage:[UIImage imageNamed:@"music_starHead_1.png"] forState:UIControlStateNormal];
// 当按钮按下时，触发doneButton方法
[self.doneButton addTarget:self action:@selector(doneButton:) forControlEvents:UIControlEventTouchUpInside];
}
if (self.editing) { // 只有当前输入框会显示done按钮
self.doneButton.hidden = NO;
} else {
self.doneButton.hidden = YES;
}
}
//定制按钮的点击事件
- (void)doneButton:(id)sender {
self.doneButton.hidden=YES;
[self resignFirstResponder];
if (doneEven!=nil) { // block 回调
doneEven(sender);
}
}
- (void)dealloc
{
self.doneButton = nil;
self.doneEven = nil;
self.buttonTitle = nil;
[super dealloc];
}
@end
参考 http://www.cocoachina.com/bbs/read.php?tid=14886&page=1