iOS 防键盘遮挡的实例

@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]; //后台切换到前台通知 [[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{ //第一个cell不往上弹输入框的位置 // if(indexPath.row!=0){ [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillChange:) name:UIKeyboardWillChangeFrameNotification object:nil]; // }}-(void)textFieldDidEndEditing:(UITextField *)textField{}#pragma mark 键盘操作- (void)keyboardWillChange:(NSNotification *)note{ NSDictionary *userInfo = note.userInfo; CGFloat duration = [userInfo[@"UIKeyboardAnimationDurationUserInfoKey"] doubleValue]; CGRect keyFrame = [userInfo[@"UIKeyboardFrameEndUserInfoKey"] CGRectValue]; //这个64是我减去的navigationbar加上状态栏20的高度,可以看自己的实际情况决定是否减去; 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