textView截取字符串-医生工作台1期

2023-08-14 09:39:34

textfield截取字符串

ios7 会崩溃

解:

之前的写法是这样的

正确的写法:

先判断markedTextRange是否为nil, markedTextRange这个属性是啥意思呢

表示文件中当前选中的文本的长度,参考下面一片文章,详细讲解了这个属性的意思:

http://www.codes51.com/article/detail_349579.html

在解决上述问题的时候你需要判断markedTextRange是不是为Nil，如果为Nil的话就说明你现在没有未选中的字符，可以计算文字长度。否则此时计算出来的字符长度可能不正确

如果选中的长度为nil,即没有选中的长度,那么就正常计算字符串长度,如果超长就截取字符串

如果选中的长度不为nil,就是有选中的,那不用截取字符串,让他正常输入,超出了,真正往textFild填充的时候,, 选中的字符串的长度为nil了,这样就会走if判断,切割字符串

还写了下面的方法:

这个方法的作用是判断,是否需要修改text in range ,是否需要修改某一段文字, 如果不实现这个代理方法,在中文输入法下面，文字长度超出后,点击键盘,还是会联想字符串

里面的判断表示,如果没有选中的文本, 文本的总长度如果超出了限制,就不让它修改 return no

如果没有选中的文本,文本长度没有超出限制,可以修改 return yes

如果有选中的文本,让他修改 return yes

完整代码：

//

//  HDFWorkTableAddCheckItemView.h

//  newDoctor

//

//  Created by songximing on 16/8/20.

//  Copyright © 2016年 haodf.com. All rights reserved.

//

#import <UIKit/UIKit.h>

/**

 *  @author songximing, 16-08-20 16:08:31 22:12 -2

 *

 *  请输入检查项目View

 */

@interface HDFBenchAddCheckItemView : UIView

- (void)show;

@property (nonatomic, copy) HDFStringBlock saveStringBlock; //<!确定按钮保存的字符串

/**

 *  @author songximing, 16-08-20 21:08:01

 *

 *  请输入检查项目View 的初始化方法

 *

 *  @param frame       必须给frame(跟屏幕相等)

 *  @param content     带入的文案内容 第一次进入没有传 nil

 *  @param title       标题 "请输入检查项目" 或者 "请输入检验项目" 两个必须填写一个

 *  @param placeHolder 站位文字 必须传

 *

 *  @return self

 */

- (instancetype)initWithFrame:(CGRect)frame content:(NSString *)content title:(NSString *)title placeHolder:(NSString *)placeHolder;

@property (nonatomic, copy) NSString *cancelString; //!<清空

@end

//

//  HDFWorkTableAddCheckItemView.m

//  newDoctor

//

//  Created by songximing on 16/8/20.

//  Copyright © 2016年 haodf.com. All rights reserved.

//

#import "HDFBenchAddCheckItemView.h"

#import "NSString+HDFAdditions.h"

#define kDescriptionMAXLength 50 //最多50字

#define kTextViewStringWidth kScreenWidth - 50 - 30 // 50是白色View的左右间距  30是textView距离白色view的左右间距

#define kBenchBottomViewHeight 45.0f

@interface HDFBenchAddCheckItemView ()<UITextViewDelegate>

@property (nonatomic, strong) UITextView *textView;

@property (nonatomic, strong) UIView *whiteContainerView;

@property (nonatomic, strong) UIButton *cancelButton;

@property (nonatomic, strong) UIControl *bgCoverControl;

@property (nonatomic, copy) NSString *title;

@property (nonatomic, copy) NSString *content; //!<带入的文本内容

@property (nonatomic, copy) NSString *placeHolder; //!<textView站位文字

@end

@implementation HDFBenchAddCheckItemView

- (void)dealloc {

    LOG(@"请输入检查项目View释放了...");

    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillHideNotification object:nil];

    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil];

}

- (instancetype)initWithFrame:(CGRect)frame content:(NSString *)content title:(NSString *)title placeHolder:(NSString *)placeHolder{

    if (self = [super initWithFrame:frame]) {

        self.title = title;

        self.content = content;

        self.placeHolder = placeHolder;

        [self configUI];

    }

    return self;

}

#pragma mark - UI

- (void)configUI {

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];

    // 灰色遮罩

    UIControl *bgCoverControl = [UIControl hdf_viewWithSuperView:self constraints:^(MASConstraintMaker *make) {

        make.edges.mas_equalTo();

    } tap:^(UIGestureRecognizer *sender) {

//        [self dismiss];

    }];

    bgCoverControl.backgroundColor = [UIColor colorWithRed: green: blue: alpha:];

    self.bgCoverControl = bgCoverControl;

    // 白色背景

    UIView *whiteContainerView = [UIView hdf_viewWithSuperView:self constraints:^(MASConstraintMaker *make) {

        make.centerY.mas_equalTo();

        make.centerX.mas_equalTo();

        make.width.mas_equalTo();

    }];

    whiteContainerView.backgroundColor = kWColor;

    whiteContainerView.alpha = ;

    whiteContainerView.layer.cornerRadius = ;

    whiteContainerView.clipsToBounds = YES;

    self.whiteContainerView = whiteContainerView;

    // title

    UILabel *titleLabel = [UILabel hdf_labelWithText:@"请输入检查项目" font:kFontWithSize() superView:whiteContainerView constraints:^(MASConstraintMaker *make) {

        make.top.mas_equalTo();

        make.centerX.mas_equalTo();

    }];

    titleLabel.textAlignment = NSTextAlignmentCenter;

    if (self.title.length > ) { // 设置标题

        titleLabel.text = self.title;

    }

    // 文本输入框

    self.textView = [UITextView hdf_textViewWithPlaceholder:@" " delegate:self superView:whiteContainerView constraints:^(MASConstraintMaker *make) {

        make.top.mas_equalTo(titleLabel.mas_bottom).offset();

        make.left.mas_equalTo();

        make.right.mas_equalTo(-);

        make.height.mas_equalTo(kFontWithSize().lineHeight * );

    }];

    self.textView.layer.cornerRadius = ;

    self.textView.clipsToBounds = YES;

    self.textView.layer.borderWidth = 0.5;

    self.textView.layer.borderColor = kColorWith16RGB(0xcccccc).CGColor;

    self.textView.hdf_placeholder = @"请输入检查项目";

    self.textView.backgroundColor = kColorWith16RGB(0xf8f8f8);

    self.textView.font = kFontWithSize();

    self.textView.hdf_placeholderFont = kFontWithSize();

    self.textView.hdf_placeholderLabel.numberOfLines = ;

    self.textView.hdf_placeholderColor = [UIColor redColor];

    [self.textView.hdf_placeholderLabel mas_updateConstraints:^(MASConstraintMaker *make) {

        make.top.mas_equalTo(self.textView).offset(7.5);

        make.left.mas_equalTo(self.textView).offset();

        make.width.mas_equalTo(self.textView.mas_width).offset(-); // 让站位文字换行

    }];

    if (self.content.length > ) { // 带入的文本内容

        self.textView.text = self.content;

        self.textView.hdf_placeholder = self.placeHolder;

        self.textView.hdf_placeholderLabel.hidden = YES;

    }else { // 无内容,展示站位文字

        self.textView.hdf_placeholder = self.placeHolder;

        self.textView.hdf_placeholderLabel.hidden = NO;

    }

//    // textView高度自适应内容

//    CGSize textSize = CGSizeZero;

//    if (isIOS(7.0)) {

//        textSize = [self.textView sizeThatFits:CGSizeMake(kTextViewStringWidth, MAXFLOAT)];

//    }

//    else{

//        textSize = self.textView.contentSize;

//    }

//    if (kTextViewHeight < textSize.height) {

//        [self.textView mas_updateConstraints:^(MASConstraintMaker *make) {

//            make.height.mas_equalTo(textSize.height);

//        }];

//    }else {

//        [self.textView mas_updateConstraints:^(MASConstraintMaker *make) {

//            make.height.mas_equalTo(kTextViewHeight);

//        }];

//    }

    [self createBottomView];

}

- (void)createBottomView {

    UIView *bottomBgView = [[UIView alloc]init];

    [self.whiteContainerView addSubview:bottomBgView];

    [bottomBgView mas_makeConstraints:^(MASConstraintMaker *make) {

        make.top.equalTo(self.textView.mas_bottom).offset();

        make.left.right.equalTo(self.whiteContainerView);

        make.height.mas_equalTo(kBenchBottomViewHeight);

    }];

    // 水平分割线

    UIView *horizontalLineView = [[UIView alloc]init];

    [bottomBgView addSubview:horizontalLineView];

    horizontalLineView.backgroundColor = kG5Color;

    [horizontalLineView mas_makeConstraints:^(MASConstraintMaker *make) {

        make.top.equalTo(bottomBgView);

        make.left.right.equalTo(bottomBgView);

        make.height.mas_equalTo(kLineHeight);

    }];

    // 垂直分割线

    UIView *verticalLineView = [[UIView alloc]init];

    [bottomBgView addSubview:verticalLineView];

    verticalLineView.backgroundColor = kG5Color;

    [verticalLineView mas_makeConstraints:^(MASConstraintMaker *make) {

        make.top.bottom.equalTo(bottomBgView);

        make.centerX.equalTo(bottomBgView);

        make.width.mas_equalTo(kLineHeight);

    }];

    kWeakObject(self)

    // 取消 按钮

    UIButton *cancelButton = [UIButton hdf_buttonWithTitle:@"取消" superView:bottomBgView constraints:^(MASConstraintMaker *make) {

        make.top.equalTo(horizontalLineView.mas_bottom);

        make.left.bottom.equalTo(bottomBgView);

        make.right.equalTo(verticalLineView.mas_left);

    } touchup:^(UIButton *sender) {

        [weakObject cancelButtonClick];

    }];

    [cancelButton setTitleColor:kNavColer forState:UIControlStateNormal];

    self.cancelButton = cancelButton;

    UIButton *confirmButton = [UIButton hdf_buttonWithTitle:@"确定" superView:bottomBgView constraints:^(MASConstraintMaker *make) {

        make.top.equalTo(horizontalLineView.mas_bottom);

        make.right.bottom.equalTo(bottomBgView);

        make.left.equalTo(verticalLineView.mas_right);

    } touchup:^(UIButton *sender) {

        [weakObject confirmButtonClick];

    }];

    [confirmButton setTitleColor:kNavColer forState:UIControlStateNormal];

    [self.whiteContainerView mas_makeConstraints:^(MASConstraintMaker *make) {

        make.bottom.equalTo(bottomBgView);

    }];

}

#pragma mark - 点击事件

- (void)confirmButtonClick {

    // 去掉首尾的空格

    self.textView.text = [self.textView.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];

//    if (self.textView.text.length < 1) {

//        [HDFHud showTip:@"请先输入检查项目"];

//        return;

//    }

    [self dismiss];

    if (self.saveStringBlock) {

        self.saveStringBlock(self.textView.text);

    }

}

- (void)cancelButtonClick {

//    self.textView.text = nil; // 点击取消,清空输入的文字

    [self dismiss];

//    if (self.saveStringBlock) {

//        self.saveStringBlock(self.textView.text);

//    }

}

#pragma UITextViewDelegate

-(void)textViewDidChange:(UITextView *)textView {

    if (self.textView.text.length == ) {

        self.textView.hdf_placeholderLabel.hidden = NO;

    }else {

        self.textView.hdf_placeholderLabel.hidden = YES;

    }

    // 限制50个字数

    if (textView.markedTextRange == nil) {

        if (self.textView.text.length > kDescriptionMAXLength) {

            //        [HDFHud showTip:@"简介最多输入50个字"];

            self.textView.text = [self.textView.text substringToIndex: kDescriptionMAXLength]; // MAXLENGTH为最大字数

        }

    }

//    // textView高度自适应内容

//    CGSize textSize = CGSizeZero;

//    if (isIOS(7.0)) {

//        textSize = [self.textView sizeThatFits:CGSizeMake(kTextViewStringWidth, MAXFLOAT)];

//    }

//    else{

//        textSize = self.textView.contentSize;

//    }

//

//    if (kTextViewHeight < textSize.height) {

//        [self.textView mas_updateConstraints:^(MASConstraintMaker *make) {

//            make.height.mas_equalTo(textSize.height);

//        }];

//        [UIView animateWithDuration:0.25 animations:^{

//            [self layoutIfNeeded];

//        }];

//    }else {

//        [self.textView mas_updateConstraints:^(MASConstraintMaker *make) {

//            make.height.mas_equalTo(kTextViewHeight);

//        }];

//    }

}

- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text{

    if (textView.markedTextRange == nil) {

        if (range.location >= kDescriptionMAXLength) {

            return NO;

        }

    }

    return YES;

}

#pragma mark - 键盘相关

// Handle keyboard show/hide changes

- (void)keyboardWillShow: (NSNotification *)notification {

    CGSize keyboardSize = [[[notification userInfo] objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;

    UIInterfaceOrientation interfaceOrientation = [[UIApplication sharedApplication] statusBarOrientation];

    if (UIInterfaceOrientationIsLandscape(interfaceOrientation) && NSFoundationVersionNumber <= NSFoundationVersionNumber_iOS_7_1) {

        CGFloat tmp = keyboardSize.height;

        keyboardSize.height = keyboardSize.width;

        keyboardSize.width = tmp;

    }

    [self.whiteContainerView mas_updateConstraints:^(MASConstraintMaker *make) {

        make.centerY.mas_equalTo(-keyboardSize.height * 0.5);

    }];

    [UIView animateWithDuration:0.2f delay:0.0 options:UIViewAnimationOptionTransitionNone

                     animations:^{

                         [self layoutIfNeeded];

                     }

                     completion:nil

     ];

}

- (void)keyboardWillHide: (NSNotification *)notification {

    [self.whiteContainerView mas_updateConstraints:^(MASConstraintMaker *make) {

        make.centerY.mas_equalTo();

    }];

    [UIView animateWithDuration:0.2f delay:0.0 options:UIViewAnimationOptionTransitionNone

                     animations:^{

                         [self layoutIfNeeded];

                     }

                     completion:nil

     ];

}

- (void)show {

    [[UIApplication sharedApplication].keyWindow addSubview:self];

    //动画

    CGAffineTransform transform = CGAffineTransformMakeScale(1.2, 1.2);

    self.whiteContainerView.transform = transform;

    [UIView animateWithDuration:0.2 animations:^{

        self.bgCoverControl.backgroundColor = [UIColor colorWithRed: green: blue: alpha:0.5];

        self.whiteContainerView.alpha = ; // 子控件的透明度跟着变化

        CGAffineTransform transform = CGAffineTransformMakeScale(, );

        self.whiteContainerView.transform = transform;

    }];

}

- (void)dismiss {

    [UIView animateWithDuration:0.2 animations:^{

        self.bgCoverControl.backgroundColor = [UIColor colorWithRed: green: blue: alpha:];

        self.whiteContainerView.alpha = ;

    } completion:^(BOOL finished) {

        [self removeFromSuperview];

    }];

}

-(void)setCancelString:(NSString *)cancelString {

    _cancelString = cancelString;

    [self.cancelButton setTitle:cancelString forState:UIControlStateNormal];

}

//****以下为解决第一次进入页面,textview不可滚动问题

- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event {

    NSString * strText = self.textView.text;

    CGFloat h = [strText heightWithFont:[UIFont systemFontOfSize:] withLineWidth:kTextViewStringWidth];

    self.textView.contentSize = CGSizeMake(, h+);

    return [super hitTest:point withEvent:event];

}

@end

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