键盘处理（HM）

//
//  HMViewController.m
//  作业-注册
//
//  Created by Vincent_Guo on 14-8-27.
//  Copyright (c) 2014年 vgios. All rights reserved.
//

#import "HMViewController.h"
#import "HMKeyboardTool.h"

@interface HMViewController ()<HMKeyboardToolDelegate>{

NSArray *_fields;//存储所有的textField
}
@property (weak, nonatomic) IBOutlet UITextField *birthdayField;
@property (weak, nonatomic) IBOutlet UIView *inputContainer;//输入框容器view

@end

@implementation HMViewController

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

//1.初始化自定议键盘
[self setupCustomKeyboard];

//2.设置每一个textfield的键盘工具view（inputAccessoryView）

[self setupKeyboardTool];

//3.监听键盘的事件
[self setupKeyoardNotification];

NSLog(@"%@",_fields);
}

//1.初始化自定议键盘
-(void)setupCustomKeyboard{
UIDatePicker *datePicker = [[UIDatePicker alloc] init];
datePicker.locale = [NSLocale localeWithLocaleIdentifier:@"zh"];
datePicker.datePickerMode = UIDatePickerModeDate;

self.birthdayField.inputView = datePicker;
}

//设置每一个textfield的键盘工具view（inputAccessoryView）
-(void)setupKeyboardTool{

//创建工具栏
HMKeyboardTool *tool = [HMKeyboardTool keyboardTool];

//设置代理
tool.delgate = self;

//1.获取输入框窗口所有子控件
NSArray *views = self.inputContainer.subviews;

//创建一个数据存储textfield
NSMutableArray *fieldsM = [NSMutableArray array];

//2.遍历
for (UIView *child in views) {
//如果子控制是UITextField的时候，设置inputAccessoryView
if ([child isKindOfClass:[UITextField class]]) {
UITextField *tf = (UITextField *)child;
tf.inputAccessoryView = tool;
//把textfield添加到数组
[fieldsM addObject:tf];
}
}

_fields = fieldsM;

}

-(void)dealloc{
[[NSNotificationCenter defaultCenter] removeObserver:self];
}

//3.监听键盘的事件
-(void)setupKeyoardNotification{

[[NSNotificationCenter  defaultCenter] addObserver:self selector:@selector(kbFrameChange:) name:UIKeyboardWillChangeFrameNotification object:nil];

}

//键盘的frame的变化

-(void)kbFrameChange:(NSNotification *)nofifi{
//NSLog(@"%@",nofifi);

//获取键盘改变化的y值
//这键盘结束时的frm
CGRect kbEndFrm =[nofifi.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];

//键盘结束时的y
CGFloat kbEndY = kbEndFrm.origin.y;

//获取当前的响应者
int currentIndex = [self getCurrentResponderIndex];
UITextField *currentTf = _fields[currentIndex];
CGFloat tfMaxY = CGRectGetMaxY(currentTf.frame) + self.inputContainer.frame.origin.y;

NSLog(@"%f %f",kbEndY,tfMaxY);
//改变控制器view的transform

//如果textfield的最大值在于键盘的y坐，才要往上移
if (tfMaxY > kbEndY) {
[UIView animateWithDuration:0.25 animations:^{
self.view.transform = CGAffineTransformMakeTranslation(0, kbEndY - tfMaxY);
}];
}else{
[UIView animateWithDuration:0.25 animations:^{
self.view.transform = CGAffineTransformIdentity;
}];
}

}

#pragma mark 键盘工具条的代理
-(void)keyboardTool:(HMKeyboardTool *)keyboardTool didClickItemType:(KeyboardItemType)itemType{

//获取当前的响应者的索引
int currentIndex = [self getCurrentResponderIndex];
NSLog(@"当前的响应者 %d",currentIndex);

if (itemType == KeyboardItemTypePrevious) {
NSLog(@"上一个");
//让上一个field成功响应者
[self showProviousField:currentIndex];
}else if(itemType == KeyboardItemTypeNext){
NSLog(@"下一个");

//让下一个field成功响应者
[self showNextField:currentIndex];
}else{
NSLog(@"完成");
[self touchesBegan:nil withEvent:nil];
}
}

//获取当前textfield的响应者索引
//如果返回-1代理没有找响应者
-(int)getCurrentResponderIndex{
//遍历所有的textfield获取响应者
for (UITextField *tf in _fields) {
if (tf.isFirstResponder) {
return [_fields indexOfObject:tf];
}
}

return -1;
}

//让上一个field成功响应者
-(void)showProviousField:(int)currentIndex{
int proviousIndex =  currentIndex - 1;

if (proviousIndex > 0  ) {
UITextField *proviousTf = [_fields objectAtIndex:proviousIndex];
[proviousTf becomeFirstResponder];
}

}

//让下一个field成功响应者
-(void)showNextField:(int)currentIndex{
int nextIndex =  currentIndex + 1;

//下一个索引不能超过_fields数组的个数
if (nextIndex < _fields.count) {
//让当前响应者分发去
UITextField *currentTf = [_fields objectAtIndex:currentIndex];
[currentTf resignFirstResponder];

UITextField *nextTf = [_fields objectAtIndex:nextIndex];
[nextTf becomeFirstResponder];
}

}

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
[self.view endEditing:YES];

[UIView animateWithDuration:0.25 animations:^{
self.view.transform = CGAffineTransformIdentity;
}];
}
@end