给iphone的键盘加上UITextField

原文地址：给键盘加上UITextField
http://www.aisidechina.com/forum/viewthread.php?tid=914
效果:


.h文件：

#import <UIKit/UIKit.h>


@interface ScoreBar : UIToolbar {
	UITextField *nameTextField;
	UILabel *scoreLabel;
}
@property (nonatomic, retain) UITextField *nameTextField; //toolbar上的输入框
@property (nonatomic, retain) UILabel *scoreLabel; //toolbar上的按钮

-(void)keyboareWillShow:(NSNotification*)aNotification; //键盘将要出现时调用

@end

.m文件

#import "ScoreBar.h"


@implementation ScoreBar
@synthesize nameTextField;
@synthesize scoreLabel;

- (id)initWithFrame:(CGRect)frame {
    if (self = [super initWithFrame:frame]) {
        // Initialization code
		self.hidden = YES;
		self.tintColor = [UIColor grayColor];
               /*
                 初始化toolbar上的textField和button 
              */
		......略
		/*
                 设定UIKeyboardWillShowNotification调用的方法
              */
		[[NSNotificationCenter defaultCenter] addObserver:self 
												 selector:@selector(keyboareWillShow:)
													 name:UIKeyboardWillShowNotification 
												   object:nil];
    }
    return self;
}


- (void)drawRect:(CGRect)rect {
	[super drawRect:rect];//调用父类的方法，这个一定要写
    // Drawing code
}


- (void)dealloc {
      .......
}

-(void)keyboareWillShow:(NSNotification*)aNotification{
        /* 取得键盘的frame */
	NSDictionary *info = [aNotification userInfo];
	NSValue *aValue = [info objectForKey:UIKeyboardBoundsUserInfoKey];
	CGRect frame;
	[aValue getValue:&frame];
        //设定toolbar的frame	
        self.frame = CGRectMake(frame.origin.x, frame.origin.y-44, frame.size.width, 44);
	
	UIWindow *tempWindow = [[[UIApplication sharedApplication] windows] objectAtIndex:1];
	UIView *keyboard;
	/*遍历windwos中所有的view，取得键盘view*/
	for(int i = 0;i<tempWindow.subviews.count;i++){
		keyboard = [tempWindow.subviews objectAtIndex:i];
		
		if([[NSString stringWithUTF8String:object_getClassName(keyboard)] isEqualToString:@"UIKeyboard"]){
			self.hidden = NO;
			[keyboard addSubview:self];
			[keyboard setBackgroundColor:[UIColor blackColor]];
		}
	}
}
@end

初始化toolbar：

ScoreBar *scoreBar = [[ScoreBar alloc] initWithFrame:CGRectMake(0, 0, 480, 44)];
scoreBar.nameTextField.delegate = self;

使用becomeFirstResponder调出键盘：

[scoreToolBar.nameTextField becomeFirstResponder];