自定义软键盘上的Return键的文本

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原创最新推荐文章于 2026-06-08 13:37:34 发布 2.2w 阅读 AI 写同款· GEO 优化 ›

交换芯片数据通路四大核心微架构深度解析数据通路是交换芯片性能的物理根基，决定着低延迟、高吞吐与突发承载能力。其本质是在硅片约束下对带宽、时序、功耗与统计复用的系统性权衡。Crossbar提供确定性低延迟但受RC延迟与功耗制约；VOQ通过虚拟队列隔离输出争抢，却引入仲裁复杂度与内存开销；Shared Buffer依托统计复用提升缓存利用率，但面临碎片化与管理策略挑战；Cell Fabric以固定长度cell重构交换粒度，在AI与金融等小包敏感场景实现尾延迟稳定。这些架构并非替代关系，而是面向不同网络不确定性（如流量不对称性、突发强度、包长分布）的阅读详情

#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

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