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textView截取字符串-医生工作台1期

IP云
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08/07
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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