- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view, typically from a nib.

    UITextField *textField=[[UITextField alloc]initWithFrame:CGRectMake(10, 100, 200, 200)];

    textField.backgroundColor=[UIColor redColor];

    [self.view addSubview:textField];

}

//第一种收起键盘的方法

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event

{

    [self.view endEditing:YES];

}

//第二种收起键盘的方法

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event

{

    [[UIApplication sharedApplication] sendAction:@selector(resignFirstResponder) to:nil from:nil forEvent:nil];

}

//第三种收起键盘的方法

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event

{

    [[[UIApplication sharedApplication] keyWindow] endEditing:YES];

}