當我們在UITextField輸入資料時經常彈出鍵盤遮擋介面，解決方法是：在彈出鍵盤時將整個UIVIew向上移動，在鍵盤消失時，UIVIew還原。

例項程式碼如下：

@interface ViewController ()<UITextFieldDelegate>

@property(nonatomic,strong)UITextField* tf;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    self.tf = [[UITextField alloc]initWithFrame:CGRectMake(10
 
, 600, 100, 20)];
    self.tf.delegate = self;

    self.tf.backgroundColor = [UIColor blackColor];
    [self.view addSubview:self.tf];


}

#pragma mark life Circle
-(void)viewWillAppear:(BOOL)animated{
    [super viewWillAppear:animated];


    //後臺切換到前臺通知
    [[NSNotificationCenter defaultCenter] addObserver:self
 
 selector:@selector(applicationWillEnterForeground)name:UIApplicationWillEnterForegroundNotification object:nil];

    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardWillHide:)
                                                 name:UIKeyboardWillHideNotification
                                               object:nil
 
];


    [self.view endEditing:YES];

}

- (void)applicationWillEnterForeground{
    [self.view endEditing:YES];
}

-(void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
    [self.view endEditing:YES];
}



#pragma mark UITextFieldDelegate
-(void)textFieldDidBeginEditing:(UITextField *)textField{


    //第一個cell不往上彈輸入框的位置
    //    if(indexPath.row!=0){
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillChange:) name:UIKeyboardWillChangeFrameNotification object:nil];
    //    }
}


-(void)textFieldDidEndEditing:(UITextField *)textField{

}
#pragma mark 鍵盤操作
- (void)keyboardWillChange:(NSNotification *)note
{

    NSDictionary *userInfo = note.userInfo;
    CGFloat duration = [userInfo[@"UIKeyboardAnimationDurationUserInfoKey"] doubleValue];

    CGRect keyFrame = [userInfo[@"UIKeyboardFrameEndUserInfoKey"] CGRectValue];
    //這個64是我減去的navigationbar加上狀態列20的高度,可以看自己的實際情況決定是否減去;
    CGFloat moveY = keyFrame.origin.y -self.tf.frame.origin.y-self.tf.frame.size.height;
    NSLog(@"%f",moveY);
    [UIView animateWithDuration:duration animations:^{
        self.view.transform = CGAffineTransformMakeTranslation(0, moveY);
    }];

}


- (void)keyboardWillHide:(NSNotification *)nsnotification
{

    [[NSNotificationCenter defaultCenter]removeObserver:self name:UIKeyboardWillChangeFrameNotification object:nil];

    [UIView animateWithDuration:0.2 animations:^{
        self.view.transform = CGAffineTransformMakeTranslation(0, 0);
    }];
}



@end