iOS开发中监听键盘状态、输入法状态

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

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

//监听键盘状态
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardDidShow:) name:UIKeyboardDidShowNotification object:nil];
//监听输入法状态
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(changeInputMode:) name:UITextInputCurrentInputModeDidChangeNotification object:nil];
}

#pragma mark Notification
//keyBoard已经展示出来
- (void)keyboardDidShow:(NSNotification *)notification
{
NSValue* aValue = [[notification userInfo] objectForKey:UIKeyboardFrameEndUserInfoKey];
CGRect keyboardRect = [aValue CGRectValue];
CGRect keyboardFrame = [self.view convertRect:keyboardRect fromView:[[UIApplication sharedApplication] keyWindow]];
CGFloat keyboardHeight = keyboardFrame.size.height;
NSLog(@"##keboardHeight=%.2f",keyboardHeight);
}

//输入法发生切换
-(void)changeInputMode:(NSNotification *)notification{
NSString *inputMethod = [[UITextInputMode currentInputMode] primaryLanguage];
NSLog(@"inputMethod=%@",inputMethod);
}

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

@end

来源 ：  http://www.lvtao.net/ios/522.html