//// ViewController.m// UITextFieldScrollDemo//// Created by WeiZhen_Liu on 13-7-19.// Copyright (c) 2013年 WeiZhen_Liu. All rights reserved.//#import "ViewController.h"@interface ViewController (){ UITextField *_textField;}@end@implementation ViewController- (void)viewDidLoad{ // self.view.frame: 0, 20, 320, 548 [super viewDidLoad]; NSLog(@"%f, %f", self.view.center.x, self.view.center.y); NSLog(@"self.view.frame.size.height: %f", self.view.frame.size.height); // 假设是iPhone5之后，则打印548.000000 去掉了状态栏的 20 _textField = [[UITextField alloc] init]; // 先假设是英文键盘 // [_textField setFrame:CGRectMake(20, self.view.frame.size.height-216-30, 280, 30)]; // 216是键盘高，30是textField高 [_textField setFrame:CGRectMake(20, 352-20-30, 280, 30)]; // 352是键盘originY，20是状态栏高，30是textField高 // 键盘的originY是相对于整个屏幕） _textField.borderStyle = UITextBorderStyleBezel; [self.view addSubview:_textField]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(didReceiveKeyBoardWillShowNotification:) name:UIKeyboardWillShowNotification object:nil];}- (void)didReceiveKeyBoardWillShowNotification:(NSNotification *)notification{ NSLog(@"************************"); NSDictionary *userInfo = [notification userInfo]; NSLog(@"%@", userInfo); /** { English key board: UIKeyboardAnimationCurveUserInfoKey = 0; UIKeyboardAnimationDurationUserInfoKey = "0.25"; UIKeyboardBoundsUserInfoKey = "NSRect: {{0, 0}, {320, 216}}"; UIKeyboardCenterBeginUserInfoKey = "NSPoint: {160, 588}"; UIKeyboardCenterEndUserInfoKey = "NSPoint: {160, 372}"; UIKeyboardFrameBeginUserInfoKey = "NSRect: {{0, 480}, {320, 216}}"; UIKeyboardFrameChangedByUserInteraction = 0; UIKeyboardFrameEndUserInfoKey = "NSRect: {{0, 264}, {320, 216}}"; } */ /** { Chinese key board: UIKeyboardAnimationCurveUserInfoKey = 0; UIKeyboardAnimationDurationUserInfoKey = 0; UIKeyboardBoundsUserInfoKey = "NSRect: {{0, 0}, {320, 252}}"; UIKeyboardCenterBeginUserInfoKey = "NSPoint: {160, 390}"; UIKeyboardCenterEndUserInfoKey = "NSPoint: {160, 354}"; UIKeyboardFrameBeginUserInfoKey = "NSRect: {{0, 264}, {320, 216}}"; UIKeyboardFrameChangedByUserInteraction = 0; UIKeyboardFrameEndUserInfoKey = "NSRect: {{0, 228}, {320, 252}}"; } */ NSLog(@"--> %@", [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey]); NSValue *value = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey]; CGFloat keyBoardOriginY = value.CGRectValue.origin.y; NSLog(@"键盘originY：%f", keyBoardOriginY); CGFloat keyBoardHeight = value.CGRectValue.size.height; NSLog(@"键盘height: %f", keyBoardHeight); NSNumber *duration = [userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey]; // CGFloat offSet = self.view.frame.size.height-keyBoardHeight-CGRectGetMaxY(_textField.frame); CGFloat offSetY = CGRectGetMaxY(_textField.frame)-(self.view.frame.size.height-keyBoardHeight); if (offSetY > 0) { // 如果键盘遮挡了textField [UIView animateWithDuration:duration.doubleValue animations:^{ self.view.frame = CGRectMake(0, 20-offSetY, self.view.frame.size.width, self.view.frame.size.height); // self.view.center = CGPointMake(self.view.center.x, self.view.center.y-offSetY); // 这样设其实是可以的，但是好像是apple的bug,第一次从英文切换到中文时， // 但是这个didReceiveKeyBoardWillShowNotification：方法会调多次，所以不能这样做 }]; } else { // 从中文到英文 [UIView animateWithDuration:0.25f animations:^{ [self.view setFrame:CGRectMake(0, 20, self.view.frame.size.width, self.view.frame.size.height)]; }]; }}- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{ [_textField resignFirstResponder]; [UIView animateWithDuration:0.25f animations:^{ [self.view setFrame:CGRectMake(0, 20, self.view.frame.size.width, self.view.frame.size.height)]; }];}- (void)dealloc{ [_textField release]; [super dealloc];}@end
