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这篇文章主要介绍了iOS如何实现键盘自适应弹出效果,具有一定借鉴价值,感兴趣的朋友可以参考下,希望大家阅读完这篇文章之后大有收获,下面让小编带着大家一起了解一下。
创新互联是专业的贵港网站建设公司,贵港接单;提供成都网站制作、成都网站建设、外贸营销网站建设,网页设计,网站设计,建网站,PHP网站建设等专业做网站服务;采用PHP框架,可快速的进行贵港网站开发网页制作和功能扩展;专业做搜索引擎喜爱的网站,专业的做网站团队,希望更多企业前来合作!一、iOS键盘自适应弹出效果图
二、工程图
三、代码
ViewController.h
#import@interface ViewController : UIViewController @end
ViewController.m
#import "ViewController.h" @interface ViewController () @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. UITextField *field=[[UITextField alloc]initWithFrame:CGRectMake(100, 300, 50, 50)]; field.backgroundColor=[UIColor redColor]; field.delegate=self; [self.view addSubview:field]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil]; } #pragma -mark -keyboard notificatin - (void)keyboardWillShow:(NSNotification *)notification { NSDictionary *info = [notification userInfo]; // keyboardHeight 为键盘高度 CGSize keyboardSize = [[info objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size; [self animateViewWithKeyboardHeight:keyboardSize.height]; } - (void)keyboardWillHide:(NSNotification *)notification { [self animateViewWithKeyboardHeight:0.0]; } - (void)animateViewWithKeyboardHeight:(CGFloat)keyboardHeight { NSTimeInterval animationDuration = 0.3f; CGFloat height = self.view.bounds.size.height; CGFloat width = self.view.bounds.size.width; CGFloat topSize = 0.0; CGFloat viewH = self.view.frame.size.height-64; CGFloat deviceHeight = [UIScreen mainScreen].bounds.size.height; CGFloat animateH = deviceHeight - viewH - keyboardHeight; if (animateH >= 0) { topSize = 0; CGRect toRect = CGRectMake(0, topSize, width, height); self.view.frame = toRect; } else { topSize = animateH; CGRect toRect = CGRectMake(0, topSize, width, height); [UIView animateWithDuration:animationDuration animations:^{ self.view.frame = toRect; }]; } } #pragma -mark -UITextFieldDelegate -(BOOL)textFieldShouldReturn:(UITextField *)textField { [textField resignFirstResponder]; return YES; } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } @end
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