[iOS]如何在textField和textView中隐藏键盘

最新推荐文章于 2024-01-14 10:14:25 发布

老六2

最新推荐文章于 2024-01-14 10:14:25 发布

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本文详细介绍了使用Swift语言开发iOS应用的基本步骤，包括环境搭建、基础语法、UI设计、网络请求等核心内容，帮助开发者快速掌握iOS开发技巧。

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#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

#pragma mark - UITextField Delegate Method  方法    
//#pragma mark用于便于在程序中查询

- (BOOL)textFieldShouldReturn:(UITextField *)textField {    //textFieldShouldReturn 是用户自己定义的方法
    [textField resignFirstResponder];   //通过委托，通知textField，放弃第一响应者；
    return YES; }  //返回YES,将会放弃第一响应者；

#pragma mark - UITextView Delegate Method 
-(BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *) text
{
    if([text isEqualToString:@"\n"]) {
        [textView resignFirstResponder];
        return NO; }
    return YES;
}


-(void) viewWillAppear:(BOOL)animated {
    //注册键盘出现通知
    [[NSNotificationCenter defaultCenter] addObserver:self
        selector:@selector (keyboardDidShow:)
        name: UIKeyboardDidShowNotification object:nil];
    //注册键盘隐藏通知
    [[NSNotificationCenter defaultCenter] addObserver:self
        selector:@selector (keyboardDidHide:)
        name: UIKeyboardDidHideNotification object:nil];
    
    [super viewWillAppear:animated];
}


-(void) viewWillDisappear:(BOOL)animated {
    //解除键盘出现通知
    [[NSNotificationCenter defaultCenter] removeObserver:self
        name: UIKeyboardDidShowNotification object:nil];
    
    //解除键盘隐藏通知
    [[NSNotificationCenter defaultCenter] removeObserver:self
        name: UIKeyboardDidHideNotification object:nil];
    
    [super viewWillDisappear:animated];
}

-(void) keyboardDidShow: (NSNotification *)notif {
    NSLog(@"键盘打开"); }

-(void) keyboardDidHide: (NSNotification *)notif {
    NSLog(@"键盘关闭"); }


- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end