- 自适应键盘出现后View的高度调整，防止遮挡输入框
1.首先在LoginViewController中实现UITextField的一个Delegate
// Created by ken on 13-7-21.
// Copyright (c) 2013年 ken. All rights reserved.
//
#import <UIKit/UIKit.h>
@interface LoginViewController : UIViewController<UITextFieldDelegate>
@property (retain, nonatomic) IBOutlet UITextField *userNumber;
@property (retain, nonatomic) IBOutlet UITextField *userPassword;
2.实现UITextFiledDelegate中的协议方法
- (void)viewDidLoad
{
[super viewDidLoad];
self.userNumber.delegate = self;
self.userPassword.delegate = self;
}
//UITextField的协议方法，当开始编辑时监听
-(BOOL)textFieldShouldBeginEditing:(UITextField *)textField
{
NSTimeInterval animationDuration=0.30f;
[UIView beginAnimations:@"ResizeForKeyboard" context:nil];
[UIView setAnimationDuration:animationDuration];
float width = self.view.frame.size.width;
float height = self.view.frame.size.height;
//上移30个单位，按实际情况设置
CGRect rect=CGRectMake(0.0f,-30,width,height);
self.view.frame=rect;
[UIView commitAnimations];
return YES;
}
//UITextField的协议方法，当结束编辑时监听
- (void) textFieldDidEndEditing:(UITextField *)textField{
[self resumeView];
}
//恢复原始视图位置
-(void)resumeView
{
NSTimeInterval animationDuration=0.30f;
[UIView beginAnimations:@"ResizeForKeyboard" context:nil];
[UIView setAnimationDuration:animationDuration];
float width = self.view.frame.size.width;
float height = self.view.frame.size.height;
//如果当前View是父视图，则Y为20个像素高度，如果当前View为其他View的子视图，则动态调节Y的高度
float Y = 20.0f;
CGRect rect=CGRectMake(0.0f,Y,width,height);
self.view.frame=rect;
[UIView commitAnimations];
}