增加了 textView
lspo9419
4 years ago
parent
f65d56f6aa
commit
e1d293f75a
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//
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// PlaceholderTextView.h
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// SaleHelper
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//
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// Created by gitBurning on 14/12/8.
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// Copyright (c) 2014年 Burning_git. All rights reserved.
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//
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#import <UIKit/UIKit.h>
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@interface BRPlaceholderTextView : UITextView
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@property(copy,nonatomic) NSString *placeholder;
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@property(strong,nonatomic) NSIndexPath * indexPath;
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//最大长度设置
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@property(assign,nonatomic) NSInteger maxTextLength;
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//更新高度的时候
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@property(assign,nonatomic) float updateHeight;
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/**
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* 增加text 长度限制
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*
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* @param maxLength <#maxLength description#>
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* @param limit <#limit description#>
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*/
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-(void)addMaxTextLengthWithMaxLength:(NSInteger)maxLength andEvent:(void(^)(BRPlaceholderTextView*text))limit;
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/**
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* 开始编辑 的 回调
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*
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* @param begin <#begin description#>
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*/
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-(void)addTextViewBeginEvent:(void(^)(BRPlaceholderTextView*text))begin;
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/**
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* 结束编辑 的 回调
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*
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* @param begin <#begin description#>
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*/
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-(void)addTextViewEndEvent:(void(^)(BRPlaceholderTextView*text))End;
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/**
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* 设置Placeholder 颜色
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*
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* @param color <#color description#>
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*/
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-(void)setPlaceholderColor:(UIColor*)color;
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/**
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* 设置Placeholder 字体
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*
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* @param font <#font description#>
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*/
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-(void)setPlaceholderFont:(UIFont*)font;
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/**
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* 设置透明度
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*
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* @param opacity <#opacity description#>
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*/
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-(void)setPlaceholderOpacity:(float)opacity;
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@end
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@ -0,0 +1,274 @@
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//
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// PlaceholderTextView.m
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// SaleHelper
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//
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// Created by gitBurning on 14/12/8.
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// Copyright (c) 2014年 Burning_git. All rights reserved.
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//
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#import "BRPlaceholderTextView.h"
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#define kTopY 7.0
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#define kLeftX 5.0
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@interface BRPlaceholderTextView()<UITextViewDelegate>
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@property(strong,nonatomic) UIColor *placeholder_color;
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@property(strong,nonatomic) UIFont * placeholder_font;
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/**
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* 显示 Placeholder
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*/
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@property(strong,nonatomic,readonly) UILabel *PlaceholderLabel;
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@property(assign,nonatomic) float placeholdeWidth;
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@property(copy,nonatomic) id eventBlock;
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@property(copy,nonatomic) id BeginBlock;
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@property(copy,nonatomic) id EndBlock;
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@end
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@implementation BRPlaceholderTextView
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// Only override drawRect: if you perform custom drawing.
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// An empty implementation adversely affects performance during animation.
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#pragma mark - life cycle
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- (id) initWithFrame:(CGRect)frame {
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if ((self = [super initWithFrame:frame])) {
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[self awakeFromNib];
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}
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return self;
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}
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- (void)awakeFromNib {
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[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(DidChange:) name:UITextViewTextDidChangeNotification object:self];
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//UITextViewTextDidBeginEditingNotification
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[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(textViewBeginNoti:) name:UITextViewTextDidBeginEditingNotification object:self];
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//UITextViewTextDidEndEditingNotification
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[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(textViewEndNoti:) name:UITextViewTextDidEndEditingNotification object:self];
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float left=kLeftX,top=kTopY,hegiht=30;
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self.placeholdeWidth=CGRectGetWidth(self.frame)-2*left;
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_PlaceholderLabel=[[UILabel alloc] initWithFrame:CGRectMake(left, top
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, _placeholdeWidth, hegiht)];
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_PlaceholderLabel.numberOfLines=0;
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_PlaceholderLabel.lineBreakMode=NSLineBreakByCharWrapping|NSLineBreakByWordWrapping;
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[self addSubview:_PlaceholderLabel];
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[self defaultConfig];
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}
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-(void)layoutSubviews
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{
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float left=kLeftX,top=kTopY,hegiht=self.bounds.size.height;
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self.placeholdeWidth=CGRectGetWidth(self.frame)-2*left;
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CGRect frame=_PlaceholderLabel.frame;
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frame.origin.x=left;
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frame.origin.y=top;
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frame.size.height=hegiht;
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frame.size.width=self.placeholdeWidth;
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_PlaceholderLabel.frame=frame;
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[_PlaceholderLabel sizeToFit];
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}
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-(void)dealloc{
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[_PlaceholderLabel removeFromSuperview];
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[[NSNotificationCenter defaultCenter] removeObserver:self];
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}
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#pragma mark - System Delegate
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#pragma mark - custom Delegate
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#pragma mark - Event response
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-(void)defaultConfig
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{
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self.placeholder_color = [UIColor lightGrayColor];
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self.placeholder_font = [UIFont systemFontOfSize:14];
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self.maxTextLength=1000;
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self.layoutManager.allowsNonContiguousLayout=NO;
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}
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-(void)addMaxTextLengthWithMaxLength:(NSInteger)maxLength andEvent:(void (^)(BRPlaceholderTextView *text))limit
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{
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if (maxLength>0) {
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_maxTextLength=maxLength;
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}
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if (limit) {
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_eventBlock=limit;
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}
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}
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-(void)addTextViewBeginEvent:(void (^)(BRPlaceholderTextView *))begin{
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_BeginBlock=begin;
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}
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-(void)addTextViewEndEvent:(void (^)(BRPlaceholderTextView *))End{
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_EndBlock=End;
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}
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-(void)setUpdateHeight:(float)updateHeight{
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CGRect frame=self.frame;
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frame.size.height=updateHeight;
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self.frame=frame;
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_updateHeight=updateHeight;
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}
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//供外部使用的 api
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-(void)setPlaceholderFont:(UIFont *)font
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{
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self.placeholder_font=font;
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}
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-(void)setPlaceholderColor:(UIColor *)color
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{
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self.placeholder_color=color;
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}
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-(void)setPlaceholderOpacity:(float)opacity
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{
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if (opacity<0) {
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opacity=1;
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}
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self.PlaceholderLabel.layer.opacity=opacity;
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}
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#pragma mark - Noti Event
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-(void)textViewBeginNoti:(NSNotification*)noti{
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if (_BeginBlock) {
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void(^begin)(BRPlaceholderTextView*text)=_BeginBlock;
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begin(self);
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}
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}
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-(void)textViewEndNoti:(NSNotification*)noti{
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if (_EndBlock) {
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void(^end)(BRPlaceholderTextView*text)=_EndBlock;
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end(self);
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}
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}
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-(void)DidChange:(NSNotification*)noti{
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if (self.placeholder.length == 0 || [self.placeholder isEqualToString:@""]) {
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_PlaceholderLabel.hidden=YES;
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}
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if (self.text.length > 0) {
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_PlaceholderLabel.hidden=YES;
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}
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else{
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_PlaceholderLabel.hidden=NO;
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}
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NSString *lang = [[self.nextResponder textInputMode] primaryLanguage]; // 键盘输入模式
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if ([lang isEqualToString:@"zh-Hans"]) { // 简体中文输入，包括简体拼音，健体五笔，简体手写
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UITextRange *selectedRange = [self markedTextRange];
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//获取高亮部分
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UITextPosition *position = [self positionFromPosition:selectedRange.start offset:0];
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// 没有高亮选择的字，则对已输入的文字进行字数统计和限制
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if (!position) {
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if (self.text.length > self.maxTextLength) {
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self.text = [self.text substringToIndex:self.maxTextLength];
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}
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}
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// 有高亮选择的字符串，则暂不对文字进行统计和限制
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else{
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}
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}
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// 中文输入法以外的直接对其统计限制即可，不考虑其他语种情况
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else{
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if (self.text.length > self.maxTextLength) {
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self.text = [ self.text substringToIndex:self.maxTextLength];
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}
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}
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if (_eventBlock && self.text.length > self.maxTextLength) {
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void (^limint)(BRPlaceholderTextView*text) =_eventBlock;
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limint(self);
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}
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}
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#pragma mark - private method
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+(float)boundingRectWithSize:(CGSize)size withLabel:(NSString *)label withFont:(UIFont *)font{
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NSDictionary *attribute = @{NSFontAttributeName:font};
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// CGSize retSize;
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CGSize retSize = [label boundingRectWithSize:size
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options:NSStringDrawingUsesLineFragmentOrigin|NSStringDrawingUsesFontLeading
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attributes:attribute
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context:nil].size;
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return retSize.height;
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}
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#pragma mark - getters and Setters
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-(void)setText:(NSString *)tex{
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if (tex.length>0) {
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_PlaceholderLabel.hidden=YES;
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}else{
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_PlaceholderLabel.hidden=NO;
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}
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[super setText:tex];
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}
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-(void)setPlaceholder:(NSString *)placeholder{
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if (placeholder.length == 0 || [placeholder isEqualToString:@""]) {
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_PlaceholderLabel.hidden=YES;
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}
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else
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{
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_PlaceholderLabel.text=placeholder;
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_placeholder=placeholder;
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// float height= [BRPlaceholderTextView boundingRectWithSize:CGSizeMake(_placeholdeWidth, MAXFLOAT) withLabel:_placeholder withFont:_PlaceholderLabel.font];
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// if (height>CGRectGetHeight(_PlaceholderLabel.frame) && height< CGRectGetHeight(self.frame)) {
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//
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// CGRect frame=_PlaceholderLabel.frame;
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// frame.size.height=height;
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// _PlaceholderLabel.frame=frame;
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//
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// }
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}
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}
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-(void)setPlaceholder_font:(UIFont *)placeholder_font
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{
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_placeholder_font=placeholder_font;
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_PlaceholderLabel.font=placeholder_font;
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}
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-(void)setPlaceholder_color:(UIColor *)placeholder_color
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{
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_placeholder_color=placeholder_color;
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_PlaceholderLabel.textColor=placeholder_color;
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}
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@end
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