iOS开发中收键盘是十分常用的功能，只需一行代码即可为ViewController添加工具条收键盘功能

更重要的是使用catogory，无代码污染。

 

代码

//  UITextField+keyboard.h//  TextFieldKeyBord////  Created by luo.h on 15/10/8.//  Copyright © 2015年 l.h. All rights reserved.//#import 
     
      @interface UITextField (keyboard)+(void)registerTextFieldInView:(UIView *)aView;@end
     

 

////  UITextField+keyboard.m//  TextFieldKeyBord////  Created by luo.h on 15/10/8.//  Copyright © 2015年 l.h. All rights reserved.//#import "UITextField+keyboard.h"@implementation UITextField (keyboard)-(void)addToolbarWitDoneTitle:(NSString*)title{    UIBarButtonItem *flexibleSpaceLeft = [[UIBarButtonItem alloc]                                          initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace                                          target:nil                                          action:nil];        UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithTitle:title                                                                   style:UIBarButtonItemStyleDone                                                                  target:self                                                                  action:@selector(dismissKeyBord)];    [doneButton  setTintColor:[UIColor redColor]];        UIToolbar *toolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, self.window.frame.size.width, 44.0)];    [toolbar setItems:@[flexibleSpaceLeft, doneButton]];    [self setInputAccessoryView:toolbar];}//查找所有UITextField并添加按钮+(void)registerTextFieldInView:(UIView *)aView;{    for (id obj in aView.subviews) {        NSLog(@"obj class: %@",[obj class]);        if ([obj isKindOfClass:[UITextField class]]) {            UITextField* theTextField = (UITextField*)obj;            [theTextField addToolbarWitDoneTitle:@"完成"];        }    }}-(void)dismissKeyBord{    [self  resignFirstResponder];}@end

 

使用：

- (void)viewDidLoad {    [super viewDidLoad];    //注册self.view里所有UITextField    [UITextField registerTextFieldInView:self.view];}

Demo:　http://files.cnblogs.com/files/sixindev/TextFieldKeyBord.zip