ios中修改数字键盘

自定义文本框：

#import <UIKit/UIKit.h>

//自定义键盘的键定义
@interface DIYKey : NSObject
{
}
@property(copy, nonatomic) NSString* name;
@property(copy, nonatomic) NSString* representedString;
@property(copy, nonatomic) NSString* displayString;
@property(copy, nonatomic) NSString* displayType;
@property(copy, nonatomic) NSString* interactionType;
@property(copy, nonatomic) NSString* variantType;
@property(assign, nonatomic) BOOL visible;
@property(assign, nonatomic) unsigned displayTypeHint;
@property(retain, nonatomic) NSString* displayRowHint;
@property(copy, nonatomic) NSArray* variantKeys;
@property(copy, nonatomic) NSString* overrideDisplayString;
@property(assign, nonatomic) BOOL disabled;
@property(assign, nonatomic) BOOL hidden;
@end

////自定义键盘的视图
@interface DIYKeyView : UIView
{
}
@property(readonly, assign, nonatomic) DIYKey* key;
@end

@protocol MJTextFieldDelegate;

@interface MJTextField : UITextField

@property(nonatomic,assign)id<MJTextFieldDelegate>  MjDelegate;
@property(nonatomic,retain) UIButton* sureButton;
-(DIYKeyView *)FindView:(NSString *)name;
-(void )addCustormButton:(NSString *)name title:(NSString *)title target:(id)target action:(SEL)action;
-(void)delCustormButton;
-(void )modifyKeyView:(NSString *)name display:(NSString *)display represent:(NSString *)represent interaction:(NSString *)type;
@end

@protocol MJTextFieldDelegate <NSObject>
-(void)keyBoardShow:(MJTextField *)textField;
-(void)keyboardHide:(MJTextField *)textField;

@end

#import "MJTextField.h"

@implementation MJTextField

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
    }
    return self;
}

-(BOOL)resignFirstResponder{
    BOOL ret=[super resignFirstResponder];
    if(self.MjDelegate){
        [self.MjDelegate keyboardHide:self];
    }

    return ret;
}

-(BOOL)becomeFirstResponder{
    BOOL ret=[super becomeFirstResponder];
    if(self.MjDelegate){
        [self.MjDelegate keyBoardShow:self];
    }
    return ret;
}

#pragma mark -find view

-(DIYKeyView *)FindKeyView:(NSString *)name inView:(UIView *)view{
    for (DIYKeyView *subview in view.subviews)
    {

        NSString *className = NSStringFromClass([subview class]);

        if ([className isEqualToString:@"UIKBKeyView"])
        {
            NSLog(@"name-->%@",subview.key.name);
            if((name==nil)||[subview.key.name isEqualToString:name])
                return subview;

        }
        else
        {
            DIYKeyView *subview2 = [self FindKeyView:name inView:subview];
            if (subview2!=nil) {
                return subview2;
            }

        }
    }
    return nil;

}

-(DIYKeyView *)FindView:(NSString *)name{
       UIWindow* window = [[[UIApplication sharedApplication] windows] objectAtIndex:];
    return [self FindKeyView:name inView:window];

}

//添加键
-(void )addCustormButton:(NSString *)name title:(NSString *)title target:(id)target action:(SEL)action{
    //先找到指定的键盘
    DIYKeyView *view=[self FindView:name];
    if(view){
        self.sureButton=[[UIButton alloc] initWithFrame:view.frame];
        self.sureButton.titleLabel.font=[UIFont boldSystemFontOfSize:];
        [self.sureButton setTitle:title forState:UIControlStateNormal];
        [self.sureButton setTitleColor:[UIColor darkGrayColor] forState:UIControlStateNormal];
        [self.sureButton setTitleColor:[UIColor blackColor] forState:UIControlStateHighlighted];
        [self.sureButton addTarget:target action:action forControlEvents:UIControlEventTouchUpInside];
        self.sureButton.showsTouchWhenHighlighted=YES;
        [view.superview addSubview:self.sureButton];
    }

}

//删除键
-(void)delCustormButton{
    if(self.sureButton){
        [self.sureButton removeFromSuperview];
        self.sureButton=nil;
    }
}

//修改键盘
-(void )modifyKeyView:(NSString *)name display:(NSString *)display represent:(NSString *)represent interaction:(NSString *)type{
    DIYKeyView *view=[self FindView:name];
    if(view){
        view.key.displayString=display;//键盘显示的内容
        view.key.representedString=represent;//点击键盘，输入的内容
        if(type){
        view.key.displayType=type;
        }
  [view setNeedsDisplay];
    }
}

@end

#import <UIKit/UIKit.h>
#import "MJTextField.h"

@interface ViewController : UIViewController<MJTextFieldDelegate>
- (IBAction)click:(id)sender;
@property (retain, nonatomic) IBOutlet UITextField *text;

@end

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

#pragma mark -生命周期方法
- (void)viewDidLoad
{
    [super viewDidLoad];
    MJTextField *mj=[[MJTextField alloc] initWithFrame:CGRectMake(, , , )];
    mj.borderStyle=UITextBorderStyleRoundedRect;
    mj.keyboardType=UIKeyboardTypeNumberPad;
    mj.tag=;
    mj.MjDelegate=self;
    [self.view addSubview:mj];
    [mj release];

    MJTextField *mj1=[[MJTextField alloc] initWithFrame:CGRectMake(, , , )];
    mj1.borderStyle=UITextBorderStyleRoundedRect;
    mj1.keyboardType=UIKeyboardTypeDefault;
    mj1.MjDelegate=self;
    mj1.tag=;
    mj1.returnKeyType=UIReturnKeyDone;
    [self.view addSubview:mj1];
    [mj1 release];

}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

-(void)keyBoardShow:(MJTextField *)textField{

    // Let's crazy!
    if(==textField.tag){
        [textField modifyKeyView:@"NumberPad-1" display:@"x" represent:@"aa" interaction:nil];

    }

}
-(void)keyboardHide:(MJTextField *)textField{
    [textField delCustormButton];
}

- (void)dealloc
{

    [super dealloc];
}

-(void)myclick:(id)sender{
    NSLog(@"aa");
}

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
    [self.view endEditing:YES];
}

@end