不知道大家是否遇见过这种问题,就是在准备输入文字的时候键盘弹出来遮挡住了输入框,导致无法输入.今天给大家讲讲这个问题.看看解决之后的效果图吧.
当键盘弹出,整个界面上移,但幅度不会太大,位置会刚刚好.看代码吧.
#import "ViewController.h"
@interface ViewController ()<UITextFieldDelegate>
@property(nonatomic, strong)UITextField *textField;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor = [UIColor whiteColor];
UIImageView *imageView = [[UIImageView alloc]initWithFrame:self.view.frame];
imageView.image =[UIImage imageNamed:@"5.jpg"];
[self.view addSubview:imageView];
self.textField = [[UITextField alloc]initWithFrame:CGRectMake(65, 500, 250, 50)];
_textField.borderStyle = 3;
_textField.delegate = self;
[self.view addSubview:_textField];
//监听,分别表示当键盘显示和隐藏时执行的方法
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide) name:UIKeyboardWillHideNotification object:nil];
}
#pragma mark 键盘出现时触发的方法
- (void)keyboardWillShow:(NSNotification *)note
{
//得到键盘的高度
NSDictionary *info = [note userInfo];
CGSize keyboardSize = [[info objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size;
//背景图向上移动键盘的高度,加号后面那句话是为了不让textfiled里键盘太远
CGFloat newY = -keyboardSize.height + (self.view.frame.size.height - (_textField.frame.origin.y + _textField.frame.size.height + 40));
//判断键盘出来后是否会遮住textfiled
if (keyboardSize.height > self.view.frame.size.height - (_textField.frame.origin.y + _textField.frame.size.height + 40)) {
//动画效果
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:.3];
self.view.frame = CGRectMake(0, newY, self.view.frame.size.width, self.view.frame.size.height);
//动画开始
[UIView commitAnimations];
}
}
#pragma mark 键盘隐藏时触发的方法
-(void)keyboardWillHide
{
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:.3];
//回到最初的位置
self.view.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height);
[UIView commitAnimations];
}
#pragma mark 回收键盘
-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
[_textField resignFirstResponder];
}
-(BOOL)textFieldShouldReturn:(UITextField *)textField
{
//点击键盘上的return按键回收键盘(失去第一响应)
[textField resignFirstResponder];
return YES;
}
-(void)viewDidDisappear:(BOOL)animated
{
//当界面跳转时移除键盘的监听
[super viewDidDisappear:animated];
[[NSNotificationCenter defaultCenter] removeObserver:self];//移除监听
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
很简单吧,大家试试吧.好了,今天就到这里,祝大家开心😄
