ios学习笔记（四）收回软键盘的两种方式

这次讲的内容很简单：

1.首先我们还是创建一个Single View Application，然后打开MainStoryboard_iphone.storyboard,在里面放入俩lable和两个TextFiled:

2.接着开始写代码：ViewController.h:

#import     @interface ViewController : UIViewController{  UITextField *nameField;  UITextField *numberField;  }  @property (nonatomic,retain) IBOutlet UITextField *nameField;  @property (nonatomic,retain) IBOutlet UITextField *numberField;  - (IBAction)backgroundTap:(id)sender;  - (IBAction)textFiledReturnEditing:(id)sender;  @end

#import "ViewController.h"    @interface ViewController ()    @end    @implementation ViewController  @synthesize nameField;  @synthesize numberField;  - (void)viewDidLoad  {      [super viewDidLoad];   // Do any additional setup after loading the view, typically from a nib.  }    - (void)viewDidUnload  {      [super viewDidUnload];      // Release any retained subviews of the main view.  }  //点击屏幕空白view时触发的事件  - (IBAction)backgroundTap:(id)sender{            [nameField resignFirstResponder];//通知文本失去第一响应者状态      [numberField resignFirstResponder];  }    //点击return时触发的事件?  - (IBAction)textFiledReturnEditing:(id)sender {      [sender resignFirstResponder];  }    - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation  {      if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {          return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);      } else {          return YES;      }  }  @end

将背景view的类别设置为UIControl，这样我们就能对屏幕的事件进行处理了，将Control的touch down输出连接到backgroundTap事件上，因为点击软键盘会触发did end on exit，那我们就把两个textFiled的did end on exit输出连接到textFiledReturnEditing事件上。当然我们不要忘记将两个textFiled控件的输出与ViewController的相应控件接口连接在一起。

4.运行程序看看效果：

点击textFiled时：

点击return或点击界面空白时：

转自：http://blog.csdn.net/itachi85/article/details/7664563