IOS开发--收回键盘

1. 新建一个项目，命名为HideKeyboard。拖入两个Label，两个TextField

2.点击ViewController.h, 写入以下代码

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController
{
    IBOutlet UITextField *userField;
    IBOutlet UITextField *passwordField;
}

@property (nonatomic,retain) IBOutlet UITextField *userField;
@property (nonatomic,retain) IBOutlet UITextField *passwordField;

- (IBAction)tapTheBlankAera:(id)sender;
- (IBAction)pressReturn:(id)sender;

@end

3.点击ViewController.m, 写入以下代码

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

@synthesize userField;
@synthesize passwordField;

-(IBAction)tapTheBlankAera :(id)sender
{
    //resignFirstResponder 会通接受对象失去第一响应者的状态
    [userField resignFirstResponder];
    [passwordField  resignFirstResponder];
}

-(IBAction)pressReturn :(id)sender
{
    [sender resignFirstResponder];
}

- (void)viewDidLoad
{
    [super viewDidLoad];
	// Do any additional setup after loading the view, typically from a nib.
}

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

@end

4.然后将user的TextField指向    IBOutletUITextField *userField;

   将password的TextField指向   IBOutletUITextField *passwordField;

5. 将View的Custom Class设置为UIControl, 右键点击View的空白处

    将Touch Down指向- (IBAction)tapTheBlankAera:(id)sender;

6.右键Name 右侧的TextField, 将Did End On Exit选项指向 - (IBAction)pressReturn:(id)sender;

然后对着 Password右侧的TextField点击右键, 将Did End On Exit选项指向 - (IBAction)pressReturn:(id)sender;

7. 点击运行就可以了.