代码:
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# import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
- ( void )viewDidLoad {
[ super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
//为textField增加键盘事件
[[NSNotificationCenter defaultCenter] addObserver:self selector: @selector (addKeyboardNoti) name:UITextFieldTextDidBeginEditingNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector: @selector (removeKeyboardNoti) name:UITextFieldTextDidEndEditingNotification object:nil];
}
#pragma -mark -keyboard notificatin
//键盘事件
- ( void )keyboardWillShow:(NSNotification *)notification {
NSDictionary *info = [notification userInfo];
// keyboardHeight 为键盘高度
CGSize keyboardSize = [[info objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size;
[self animateViewWithKeyboardHeight:keyboardSize.height];
}
- ( void )keyboardWillHide:(NSNotification *)notification {
[self animateViewWithKeyboardHeight: 0.0 ];
}
- ( void )animateViewWithKeyboardHeight:(CGFloat)keyboardHeight {
NSTimeInterval animationDuration = 0 .3f;
CGFloat height = self.view.bounds.size.height;
CGFloat width = self.view.bounds.size.width;
CGFloat topSize = 0.0 ;
CGFloat viewH = self.view.frame.size.height- 64 ;
CGFloat deviceHeight = [UIScreen mainScreen].bounds.size.height;
CGFloat animateH = deviceHeight - viewH - keyboardHeight;
if (animateH >= 0 ) {
topSize = 0 ;
CGRect toRect = CGRectMake( 0 , topSize, width, height);
self.view.frame = toRect;
} else {
topSize = animateH;
CGRect toRect = CGRectMake( 0 , topSize, width, height);
[UIView animateWithDuration:animationDuration animations:^{
self.view.frame = toRect;
}];
}
}
#pragma -mark -UITextFieldText Notification
//增加键盘事件
-( void )addKeyboardNoti
{
NSLog(@ "------addKeyboardNoti-------" );
[[NSNotificationCenter defaultCenter] addObserver:self selector: @selector (keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector: @selector (keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];
}
//移除键盘事件
-( void )removeKeyboardNoti
{
NSLog(@ "------removeKeyboardNoti---------" );
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillHideNotification object:nil];
}
- ( void )didReceiveMemoryWarning {
[ super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
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总结
以上所述是小编给大家介绍的iOS中只让textField使用键盘通知的实例代码,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持!
原文链接:http://www.cnblogs.com/yang-guang-girl/archive/2017/07/18/7201989.html