iOS开发之键盘挡住输入框的完美解决办法即输入框位置如何随着键盘的升起而升高，类方法实现，不需要每个输入框写大量代码
网上搜到很多办法，可是发现多多少少都有问题，比如：
1.不支持第三方输入法，比如搜狗
2.有的对系统的不同键盘，支持的也不完善
3.有的是改的键盘工具栏
4.有的把整个工程的都改了
先上段录像吧，这是我的实现效果
。
实现原理：键盘弹出来的时候把scrollow的高度改为屏幕中键盘剩下的高度，计算输入框和scrollow底部距离，这个距离就是scrollow的contentOffset需要改变的。
1.输入框放在一个cell里，实现其代理方法
这个是键盘升起的
- (void)textFieldDidBeginEditing:(UITextField *)textField{
if ([self.superview isKindOfClass:[UIScrollView class]]) {
[GlobalKeyBoardMoveUp scrollView:textField andSuperView:self.superview ];
}
}
这个是收键盘的
//
//收键盘
//
- (void)textFieldDidEndEditing:(UITextField *)textField{
if ([self.superview isKindOfClass:[UIScrollView class]]) {
[UIView animateWithDuration:0.3 animations:^{
[(UIScrollView *)self.superview setContentOffset:CGPointMake(0, 0)];
[(UIScrollView *)self.superview setSize:CGSizeMake(SCREEN_WIDTH_NEW, SCREEN_HEIGHT_NEW)];
} completion:^(BOOL finished) {
}];
}
}
由于系统键盘 第三方键盘无法直接获取高度，因此使用下边方法获取
//
//获取系统键盘高度
//
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(changeTextFieldFrame:) name:UIKeyboardDidShowNotification object:nil];
//
//键盘弹起来后才会走这个方法
//
- (void)changeTextFieldFrame:(NSNotification *)noti{
//
//获取系统键盘高度
//
NSDictionary *userInfo = noti.userInfo;
CGRect r = [userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];
_keyBoardHeight = r.size.height;
if([self.rightTextFiled isFirstResponder]){
[self textFieldDidBeginEditing:_rightTextFiled];
}
}
//
//获取系统键盘高度
//
- (double)getKeyBoardHeight{
return _keyBoardHeight;
}
2.键盘上升方法
//
//
//
//
// Created by yfc on 16/9/12.
//
//
#import "GlobalKeyBoardMoveUp.h"
#import "LikeCellView.h"
#import "UIView+Utils.h"
@interface GlobalKeyBoardMoveUp ()
@property(nonatomic,retain)UITextField *textFiled;
@end
@implementation GlobalKeyBoardMoveUp
//
//参数：textFiled输入框 theScrollow需要升降的Scrollow
//
+ (void)scrollView:(UIView *)textFiled andSuperView:(UIScrollView*)theScrollow {
GlobalKeyBoardMoveUp *upAndDown = [[GlobalKeyBoardMoveUp alloc]init];
upAndDown.textFiled = (UITextField*)textFiled;
//
//输入框的坐标转换到滚动view上
//
CGRect textFiledConvertFrame = [textFiled.superview convertRect:textFiled.frame toView:theScrollow];
//
//滚动视图活动的height
//
double heightWithoutKeyBoard = SCREEN_HEIGHT_NEW - [upAndDown differentKeyBoardHeight] - theScrollow.top;
//
//现在键盘已经展示出来了 动画时间要慢于键盘出来时间
//
[UIView animateWithDuration:0.3 animations:^{
theScrollow.height = heightWithoutKeyBoard;
//
//输入框展示不全判断条件。这是和输入框的bottom比的 实际中下方会有空白分割线等 所有减去30 为了能点到下边的输入框减70
//
if(textFiledConvertFrame.origin.y + textFiled.height > (heightWithoutKeyBoard - 70)){
theScrollow.contentOffset = CGPointMake(0, textFiledConvertFrame.origin.y + textFiled.height - (heightWithoutKeyBoard - 70));
}
}];
}
- (double)differentKeyBoardHeight{
//
//新增不同的键盘计算不同的高度
//
double differentKeyBoardHeight = 0;
UIView *inputView_ = _textFiled.inputView;
NSLog(@"键盘高度%f",inputView_.height);
//
//密码键盘
//
if([_textFiled.inputView isKindOfClass:[NSClassFromString(@"iPhoneKeyboard") class]]){
UIView *inputView = _textFiled.inputView;
differentKeyBoardHeight = inputView.height;
if(IsIphoneX){
differentKeyBoardHeight = inputView.height - 49;
}
}
//
//登录键盘
//
else if([_textFiled.inputView isKindOfClass:[NSClassFromString(@"iPhoneKeyboardSpaceNewStyle") class]]){
UIView *inputView = _textFiled.inputView;
differentKeyBoardHeight = inputView.height;
if(IsIphoneX){
differentKeyBoardHeight = inputView.height - 34;
}
}
//
//iPad加密键盘
//
else if ([_textFiled.inputView isKindOfClass:[NSClassFromString(@"iPadKeyboard") class]]){
UIView *inputView = _textFiled.inputView;
differentKeyBoardHeight = inputView.height;
}
//
//系统键盘
//
else{
//
//系统键盘需要通过监听多次才能获取到真实高度
//
if ([_textFiled.superview respondsToSelector:@selector(getKeyBoardHeight)]) {
differentKeyBoardHeight = [((LikeCellView*)_textFiled.superview) getKeyBoardHeight];
if (differentKeyBoardHeight < 1) {
differentKeyBoardHeight = 240 * HEIGHT_SCALE;
if (IS_IPAD) {
differentKeyBoardHeight = 100;
}
}
}else{
differentKeyBoardHeight = 240 * HEIGHT_SCALE;
}
if (IsIphoneX) {
differentKeyBoardHeight -= 34;
}
}
//
//inputAccessoryView也算入键盘高度 _textFiled.inputView 系统键盘是 nil
//
if (_textFiled.inputAccessoryView && _textFiled.inputView != nil) {
differentKeyBoardHeight += _textFiled.inputAccessoryView.height;
}
return differentKeyBoardHeight;
}
@end
#warning 如果模拟器运行 要打开HardWare->Keyboard->Toggle Software Keyboard 而且模拟器上的效果和真机是有差别的
3调用方法
- (void)viewDidLoad {
[super viewDidLoad];
UIScrollView *scrollow = [[UIScrollView alloc]initWithFrame:CGRectZero];
scrollow.top = 0;
scrollow.left = 0;
scrollow.width = SCREEN_WIDTH_NEW;
scrollow.height = SCREEN_HEIGHT_NEW;
scrollow.contentSize = CGSizeMake(SCREEN_WIDTH_NEW, SCREEN_HEIGHT_NEW+1);
[self.view addSubview:scrollow];
#warning 如果模拟器运行 要打开HardWare->Keyboard->Toggle Software Keyboard
double space = 0.0;
//
//这里就只拿系统键盘了 自己定义键盘就不展示了
//
LikeCellView *a1 = [[LikeCellView alloc]initWithFrame:CGRectZero title:@"测试1" placeholder:@"数字键盘" keyBoardType:@"N"];
a1.top = 280;
[scrollow addSubview:a1];
LikeCellView *a2 = [[LikeCellView alloc]initWithFrame:CGRectZero title:@"测试2" placeholder:@"UIKeyboardTypeDefault" keyBoardType:@"UIKeyboardTypeDefault"];
a2.top = a1.bottom + space;
[scrollow addSubview:a2];
LikeCellView *a3 = [[LikeCellView alloc]initWithFrame:CGRectZero title:@"测试3" placeholder:@"UIKeyboardTypeASCIICapable" keyBoardType:@"UIKeyboardTypeASCIICapable"];
a3.top = a2.bottom + space;
[scrollow addSubview:a3];
LikeCellView *a4 = [[LikeCellView alloc]initWithFrame:CGRectZero title:@"测试4" placeholder:@"UIKeyboardTypeNumbersAndPunctuation" keyBoardType:@"UIKeyboardTypeNumbersAndPunctuation"];
a4.top = a3.bottom + space;
[scrollow addSubview:a4];
LikeCellView *a5 = [[LikeCellView alloc]initWithFrame:CGRectZero title:@"测试5" placeholder:@"UIKeyboardTypeURL" keyBoardType:@"UIKeyboardTypeURL"];
a5.top = a4.bottom + space;
[scrollow addSubview:a5];
LikeCellView *a6 = [[LikeCellView alloc]initWithFrame:CGRectZero title:@"测试6" placeholder:@"NN" keyBoardType:@"NN"];
a6.top = a5.bottom + space;
[scrollow addSubview:a6];
scrollow.contentSize = CGSizeMake(SCREEN_WIDTH, a6.bottom +100);
}