iOS完美实现输入框随键盘无缝滑动的效果_KLCPopKeyBoard

来源：互联网发布：linux编辑文档编辑：程序博客网时间：2024/05/19 13:43

iOS中UITextField控件和UITextView控件经常需要对键盘做弹起和退出动作,一般使用的是becomeFirstResponder和resignFirstResponder方法，但是这样也有明显的缺点，就是会在键盘的弹起退出过程中经常出现黑边，或者断层，导致效果很不好看，在网上找了些资料，自己做了一个自定义的输入框来解决这个问题，效果类似于微信和QQ的聊天框。

不废话，直接上代码，另外做了一个demo，链接为https://github.com/didashao/KLCPopKeyBoard

KLCPopKeyBoard.h

#import <UIKit/UIKit.h>@class KLCPopKeyBoard;@protocol KLCPopKeyBoardDelegate <NSObject>- (void)popKeyBoard:(KLCPopKeyBoard *)popKeyBoard didClickSend:(BOOL)didClickSend;- (void)popKeyBoardHide;- (void)popKeyBoardShow;@end@interface KLCPopKeyBoard : UIView@property (nonatomic, weak) id<KLCPopKeyBoardDelegate> delegate;@property (nonatomic, copy) NSString *content;//输入框内容@property (nonatomic, copy) NSString *placeholder;- (instancetype)initWithPlaceholder:(NSString *)placeholder buttonTitle:(NSString *)buttonTitle;//成对使用,可以保证一直在屏幕中出现- (void)viewWillAppear;- (void)viewWillDisAppear;//成对使用,可以保证单次显示- (void)show;- (void)hide;//推出键盘和退出键盘- (void)pushKeyboard;- (void)hideKeyboard;@end

KLCPopKeyBoard.m

#import "KLCPopKeyBoard.h"#define KeyBoardHeight 44#define FullScreen_Height [[UIScreen mainScreen] bounds].size.height#define FullScreen_Width [[UIScreen mainScreen] bounds].size.widthstatic inline UIViewAnimationOptions NgAnimationOptionsWithCurve(UIViewAnimationCurve curve){    switch (curve) {        case UIViewAnimationCurveEaseInOut:            return UIViewAnimationOptionCurveEaseInOut;        case UIViewAnimationCurveEaseIn:            return UIViewAnimationOptionCurveEaseIn;        case UIViewAnimationCurveEaseOut:            return UIViewAnimationOptionCurveEaseOut;        case UIViewAnimationCurveLinear:            return UIViewAnimationOptionCurveLinear;    }    return 0;}@interface KLCPopKeyBoard()<UITextFieldDelegate>{    UIView *_bgView;        UITextField *_field;        UIButton *_button;        NSString *_placeholder;        NSString *_buttonTitle;        //BOOL _willHidden;}@end@implementation KLCPopKeyBoard- (instancetype)init{    self = [super init];    if (self) {        _placeholder = @"";        _buttonTitle = @"发送";        [self setupUI];    }    return self;}- (instancetype)initWithPlaceholder:(NSString *)placeholder buttonTitle:(NSString *)buttonTitle{    self = [super init];    if (self) {        _placeholder = placeholder;        _buttonTitle = buttonTitle;        [self setupUI];    }    return self;}- (void)setupUI{    self.frame = CGRectMake(0, FullScreen_Height - KeyBoardHeight, FullScreen_Width, KeyBoardHeight);        _bgView = [[UIView alloc]init];    _bgView.frame = self.bounds;    _bgView.backgroundColor = [UIColor whiteColor];    [self addSubview:_bgView];        UIView *line = [[UIView alloc]init];    line.frame = CGRectMake(0, 0, FullScreen_Width, 0.5);    line.backgroundColor = [UIColor blackColor];    [_bgView addSubview:line];        CGFloat height = 30;    CGFloat topMargin = (KeyBoardHeight - height)/2;    CGFloat leftMargin = 10;    CGFloat buttonWidth = 44;    CGFloat buttonHeight = 30;        _field = [[UITextField alloc]init];    _field.frame = CGRectMake(leftMargin, topMargin, FullScreen_Width - leftMargin*3 - buttonWidth, height);    _field.backgroundColor = [UIColor whiteColor];    _field.textColor = [UIColor blackColor];    _field.font = [UIFont systemFontOfSize:14];    _field.returnKeyType = UIReturnKeyDone;    _field.layer.cornerRadius = 3;    _field.clipsToBounds = YES;    _field.delegate = self;    _field.placeholder = _placeholder;    [_bgView addSubview:_field];        _button = [[UIButton alloc]init];    _button.frame = CGRectMake(CGRectGetMaxX(_field.frame)+leftMargin, topMargin, buttonWidth, buttonHeight);    [_button setTitle:_buttonTitle forState:UIControlStateNormal];    _button.titleLabel.font = [UIFont systemFontOfSize:14];    _button.backgroundColor = [UIColor yellowColor];    [_button setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];    _button.layer.cornerRadius = 3;    _button.clipsToBounds = YES;    [_button addTarget:self action:@selector(didClickButton:) forControlEvents:UIControlEventTouchUpInside];    [_bgView addSubview:_button];}#pragma mark -发送- (void)didClickButton:(UIButton *)btn{        _content = _field.text;    if ([_delegate respondsToSelector:@selector(popKeyBoard:didClickSend:)]) {        [_delegate popKeyBoard:self didClickSend:YES];        _field.text = nil;        [self hideKeyboard];    }}- (void)setPlaceholder:(NSString *)placeholder{    _placeholder = placeholder;    _field.placeholder = placeholder;}#pragma mark - 展示控制- (void)viewWillAppear{    [self show];}- (void)viewWillDisAppear{    [self hide];}- (void)show{    dispatch_async(dispatch_get_main_queue(), ^{        for (UIView *view in [UIApplication sharedApplication].keyWindow.subviews) {            if ([view isKindOfClass:[KLCPopKeyBoard class]]) {                return;            }        }        [[UIApplication sharedApplication].keyWindow addSubview:self];        [[UIApplication sharedApplication].keyWindow bringSubviewToFront:self];    });}-(void)hide{    dispatch_async(dispatch_get_main_queue(), ^{        [self removeFromSuperview];    });    /*    if ([_field isFirstResponder]) {        _willHidden = YES;        [self hideKeyboard];    } else {        dispatch_async(dispatch_get_main_queue(), ^{            [self removeFromSuperview];        });    }*/}#pragma mark - 推出和退出键盘- (void)pushKeyboard{    if (![_field isFirstResponder]) {        [_field becomeFirstResponder];        if ([_delegate respondsToSelector:@selector(popKeyBoardShow)]) {//            [_delegate popKeyBoardShow];        }    }}- (void)hideKeyboard{    if ([_field isFirstResponder]) {        [_field resignFirstResponder];        if ([_delegate respondsToSelector:@selector(popKeyBoardHide)]) {            [_delegate popKeyBoardHide];        }    }}#pragma mark - 键盘监听- (void)startListenKeyboard{    [[NSNotificationCenter defaultCenter]     addObserver:self     selector:@selector(onKeyboardWillShow:)     name:UIKeyboardWillShowNotification object:nil];        [[NSNotificationCenter defaultCenter]     addObserver:self     selector:@selector(onKeyboardWillHide:)     name:UIKeyboardWillHideNotification object:nil];        [[NSNotificationCenter defaultCenter]     addObserver:self     selector:@selector(onKeyboardDidShow:)     name:UIKeyboardDidShowNotification object:nil];        [[NSNotificationCenter defaultCenter]     addObserver:self     selector:@selector(onKeyboardDidHide:)     name:UIKeyboardDidHideNotification object:nil];        [[NSNotificationCenter defaultCenter]     addObserver:self     selector:@selector(onKeyboardWillChangeFrame:)     name:UIKeyboardWillChangeFrameNotification object:nil];        [[NSNotificationCenter defaultCenter]     addObserver:self     selector:@selector(onKeyboardDidChangeFrame:)     name:UIKeyboardDidChangeFrameNotification object:nil];}- (void)endListenKeyboard{    [[NSNotificationCenter defaultCenter] removeObserver:self];}- (void)onKeyboardWillShow:(NSNotification *)note {        }- (void)onKeyboardDidShow:(NSNotification *)note {    }- (void)onKeyboardWillHide:(NSNotification *)note {    if ([_delegate respondsToSelector:@selector(popKeyBoardHide)]) {        [_delegate popKeyBoardHide];    }    }- (void)onKeyboardDidHide:(NSNotification *)note {    }- (void)onKeyboardWillChangeFrame:(NSNotification *)note {    //Log("%@",note.userInfo);    [self captureKeyboardFrameWithInfo:note.userInfo];}- (void)onKeyboardDidChangeFrame:(NSNotification *)note {    //Log("%@",note.userInfo);    //[self captureKeyboardFrameWithInfo:note.userInfo];}- (void)captureKeyboardFrameWithInfo:(NSDictionary *)info{    CGRect _endFrame = [info[UIKeyboardFrameEndUserInfoKey] CGRectValue];    NSTimeInterval _animationDuration = [info[UIKeyboardAnimationDurationUserInfoKey] doubleValue];    UIViewAnimationCurve animationCurve = (UIViewAnimationCurve)[info[UIKeyboardAnimationCurveUserInfoKey] integerValue];        [UIView animateWithDuration:_animationDuration delay:0 options:NgAnimationOptionsWithCurve(animationCurve) animations:^{        CGRect myFrame = self.frame;        myFrame.origin.y = _endFrame.origin.y - KeyBoardHeight;        self.frame = myFrame;    } completion:^(BOOL finished) {        /*if (_willHidden) {            dispatch_async(dispatch_get_main_queue(), ^{                [self removeFromSuperview];            });            _willHidden = NO;        }*/    }];}#pragma mark - TextField delegate-(BOOL)textFieldShouldBeginEditing:(UITextField *)textField{    if ([_delegate respondsToSelector:@selector(popKeyBoardHide)]) {        [_delegate popKeyBoardShow];    }        [self startListenKeyboard];    return YES;}-(BOOL)textFieldShouldEndEditing:(UITextField *)textField{    return YES;}-(void)textFieldDidEndEditing:(UITextField *)textField{    self.content = textField.text;    [self endListenKeyboard];}-(BOOL)textFieldShouldReturn:(UITextField *)textField{    //    [textField resignFirstResponder];//    if ([_delegate respondsToSelector:@selector(popKeyBoard:didClickSend:)]) {//        [_delegate popKeyBoard:self didClickSend:YES];//        _field.text = nil;//        if ([_delegate respondsToSelector:@selector(popKeyBoardHide)]) {//            [_delegate popKeyBoardHide];//        }//    }        [self didClickButton:nil];        return YES;}@end

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