[iOS]利用通知实现监听系统键盘
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[iOS]利用通知实现监听系统键盘
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//
// ViewController.m
// text
//
// Created by 李東旭 on 16/1/22.
// Copyright ? 2016年 李東旭. All rights reserved.
//#import <UIKit/UIKit.h>
#import "ViewController.h"@interface ViewController ()@end@implementation ViewController- (void)viewDidLoad {[super viewDidLoad];UITextView *textV = [[UITextView alloc] initWithFrame:self.view.bounds];[self.view addSubview:textV];// 1. 添加通知[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyBoardChange:) name:UIKeyboardWillShowNotification object:nil];// 鍵盤將要出現 UIKeyboardWillShowNotification// 鍵盤已經出現 UIKeyboardDidShowNotification// 鍵盤將要隱藏 UIKeyboardWillHideNotification// 鍵盤已經隱藏 UIKeyboardDidHideNotification}// 2. 鍵盤已經出現調用的觸發方法
- (void)keyBoardChange:(NSNotification *)noti
{NSLog(@"%@", noti);
// 打印noti/*0x7f84584d1000 {name = UIKeyboardDidShowNotification; userInfo = {
// 鍵盤動畫執行節奏UIKeyboardAnimationCurveUserInfoKey = 7;// 鍵盤動畫的時間UIKeyboardAnimationDurationUserInfoKey = "0.25";// 鍵盤的boundsUIKeyboardBoundsUserInfoKey = "NSRect: {{0, 0}, {375, 258}}";// 鍵盤的起始centerUIKeyboardCenterBeginUserInfoKey = "NSPoint: {187.5, 796}";// 鍵盤的結束centerUIKeyboardCenterEndUserInfoKey = "NSPoint: {187.5, 538}";// 鍵盤開始動畫前的位置（也就是消失時）UIKeyboardFrameBeginUserInfoKey = "NSRect: {{0, 667}, {375, 258}}";// 鍵盤結束動畫后的位置（也就是彈出了）UIKeyboardFrameEndUserInfoKey = "NSRect: {{0, 409}, {375, 258}}";UIKeyboardIsLocalUserInfoKey = 1;}}*/// 3. 那么如何獲取這個值呢NSDictionary *noKey = [noti userInfo];NSValue *value = noKey[@"UIKeyboardBoundsUserInfoKey"];// 注意，這個的value 是CGRect類型的（所以下面必須調用CGRectValue方法NSLog(@"%f", [value CGRectValue].size.height);}@end
轉載于:https://www.cnblogs.com/wangqi1221/p/5240217.html
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