今天学习ios oc 开发，发现输入框不能跟随键盘变化，通过查找资料终于解决了这个问题，具体代码如下
代码如下
前提设置
//
// AppDelegate.h
// uesjpad
//
// Created by jiangfengcheng on 2022/3/12.
//
#import <UIKit/UIKit.h>
@interface AppDelegate : UIResponder <UIApplicationDelegate>
@property (nonatomic,strong) UIWindow *window;
@end
设置如下
//
// ViewController.m
// uesjpad
//
// Created by jiangfengcheng on 2022/3/12.
//
#import “ViewController.h”
@interface ViewController ()
@property (weak, nonatomic) IBOutletUITextField *username;
@property (weak, nonatomic) IBOutletUITextField *password;
@end
@implementationViewController
– (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
self.username.placeholder=@”请输入用户名”;
self.password.placeholder=@”请输入密码”;
//设置密码显示
self.password.secureTextEntry = YES;
//方法1 通过代理来完成键盘回收
//添加键盘监听事件
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(yjd_keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
}
// 输入控件键盘高度
– (void)yjd_keyboardWillShow🙁NSNotification *)notifi
{
//获取键盘的高度
NSDictionary *userInfo = [notifi userInfo];
NSValue *aValue = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey];
CGFloat keyboardHeight = [aValue CGRectValue].size.height;//键盘的高度
//获取键盘动画时间
CGFloat time = [notifi.userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue];
//获取当前第一响应状态的输入框
UIWindow *keyWindow = [[UIApplication sharedApplication] keyWindow];
UIView *view = [keyWindow performSelector:@selector(firstResponder)];
//输入框在当前屏幕的坐标y
CGFloat maxY = CGRectGetMaxY([view convertRect:view.bounds toView:[[[UIApplication sharedApplication] delegate] window]]);
//判断是非遮挡当前输入框，小于0遮挡，大于或等于0没有
CGFloat map = [UIScreen mainScreen].bounds.size.height – maxY – keyboardHeight;
NSLog(@”map = %f”, map);
if (map < 0) {
[UIView animateWithDuration:time animations:^{
self.view.transform = CGAffineTransformTranslate(self.view.transform, 0, map);
}];
}
}
//点击键盘return
– (BOOL)textFieldShouldReturn🙁UITextField *)textField {
if (textField.returnKeyType == UIReturnKeyNext) {
NSLog(@”textFieldShouldReturn”);
UITextField *nextTextField = (UITextField *)[self.view viewWithTag:textField.tag + 1];
[textField endEditing:YES];
[nextTextField becomeFirstResponder];
} else {
NSLog(@”textFieldShouldReturn===transform”);
[self endEdit];
}
returnYES;
}
//隐藏键盘
– (void)endEdit {
[self.view endEditing:YES];
self.view.transform = CGAffineTransformIdentity;
}
//点击其他位置隐藏键盘
– (void)touchesEnded🙁NSSet<UITouch *> *)touches withEvent🙁UIEvent *)event
{
[self endEdit];
}
– (void)dealloc
{
//移除通知
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil];
}
//初始化UITextField
– (void)initTextField🙁UITextField *)textField leftImage🙁UIImage *)leftImage{
//设置边框
textField.layer.borderColor = [UIColor grayColor].CGColor;
textField.layer.borderWidth = 1.0;
textField.layer.cornerRadius = 10;
//设置内边距、paddingTop、paddingLeft、paddingBottom、paddingRight
// [textField setValue:[NSNumber numberWithInt:20] forKey:@”paddingLeft”];
UIView *leftView=[[UIView alloc]initWithFrame:CGRectMake(0, 0, 40, 40)];
//设置左侧“返回”
UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(10, 8, 25, 24)];
imageView.image =leftImage;
[leftView addSubview:imageView];
textField.leftView = leftView;
//设置显示模式
textField.leftViewMode = UITextFieldViewModeAlways;
textField.clearButtonMode = UITextFieldViewModeWhileEditing;
//设置代理
textField.delegate = self;
}
@end
