//
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// CustomTextField.m
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// TextField自动换行
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//
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// Created by yangqijia on 16/8/11.
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// Copyright © 2016年 yangqijia. All rights reserved.
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//
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#import "CustomTextField.h"
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@implementation CustomTextField
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{
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//坐标
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CGRect _frame;
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//用label显示内容
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UILabel *_label;
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//是否显示清空按钮
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BOOL _clear;
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//设置leftView
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UIView *_leftView;
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//设置字号
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CGFloat _fontSize;
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}
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/**
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* 自定义初始化方法
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*
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* @param frame frame
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* @param placeholder 提示语
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* @param clear 是否显示清空按钮 YES为显示
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* @param view 是否设置leftView不设置传nil
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* @param font 设置字号
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*
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* @return
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*/
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-(id)initWithFrame:(CGRect)frame placeholder:(NSString *)placeholder clear:(BOOL)clear leftView:(id)view fontSize:(CGFloat)font withContent:(NSString *)content
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{
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self = [super initWithFrame:frame];
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if (self) {
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_frame = frame;
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_clear = clear;
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_leftView = (UIView *)view;
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_fontSize = font;
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self.placeholder = placeholder;
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self.textColor = [UIColor clearColor];
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self.font = [UIFont systemFontOfSize:_fontSize weight:UIFontWeightMedium];
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self.delegate = self;
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if (clear) {
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self.clearButtonMode = UITextFieldViewModeAlways;
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}
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if (view) {
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self.leftView = view;
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self.leftViewMode = UITextFieldViewModeAlways;
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}
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[self createLabel:content];
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[self addTarget:self action:@selector(textFieldDidChange:) forControlEvents:UIControlEventEditingChanged];
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}
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return self;
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}
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/**
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* 监听textField内容的改变
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*
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* @param sender
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*/
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- (void) textFieldDidChange:(id) sender {
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UITextField *textField = (UITextField *)sender;
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CGSize size = [self labelText:[NSString stringWithFormat:@"%@",textField.text] fondSize:_fontSize width:_label.frame.size.width];
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_label.frame = CGRectMake(_label.frame.origin.x, _label.frame.origin.y, _label.frame.size.width, size.height < _frame.size.height ? _frame.size.height : size.height);
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self.frame = CGRectMake(_frame.origin.x, _frame.origin.y, _frame.size.width, size.height < _frame.size.height ? _frame.size.height : size.height);
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if (textField.text.length == 0) {
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_label.text = @"";
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self.tintColor=[UIColor blueColor];
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}else{
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//添加一个假的光标
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self.tintColor=[UIColor clearColor];
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NSString *text = [NSString stringWithFormat:@"%@",textField.text];
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NSMutableAttributedString *attString = [[NSMutableAttributedString alloc]initWithString:text];
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[attString addAttribute:NSForegroundColorAttributeName value:[UIColor blueColor] range:NSMakeRange(text.length - 1, 1)];
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_label.attributedText = attString;
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}
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}
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/**
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* 创建label
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*/
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-(void)createLabel:(NSString *)content;
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{
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_label = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, _frame.size.width, _frame.size.height)];
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if (_leftView) {
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_label.frame = CGRectMake(_leftView.frame.size.width, _label.frame.origin.y, _label.frame.size.width-_leftView.frame.size.width, _label.frame.size.height);
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}
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if (_clear) {
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_label.frame = CGRectMake(_label.frame.origin.x, _label.frame.origin.y, _label.frame.size.width-20, _label.frame.size.height);
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}
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_label.text = content;
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_label.backgroundColor = [UIColor colorWithRed:0 green:0 blue:0 alpha:0];
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_label.font = [UIFont systemFontOfSize:_fontSize weight:UIFontWeightMedium];
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_label.numberOfLines = 2;
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[self addSubview:_label];
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}
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#pragma mark - UITextFieldDelegate
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//点击return回收键盘
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-(BOOL)textFieldShouldReturn:(UITextField *)textField
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{
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[textField resignFirstResponder];
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return YES;
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}
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//开始编辑
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- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField
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{
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NSLog(@"将要编辑");
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return YES;
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}
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//开始编辑
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- (void)textFieldDidBeginEditing:(UITextField *)textField
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{
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NSLog(@"开始编辑");
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}
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//将要编辑完成
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- (BOOL)textFieldShouldEndEditing:(UITextField *)textField
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{
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NSLog(@"将要编辑完成");
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return YES;
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}
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//编辑完成
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- (void)textFieldDidEndEditing:(UITextField *)textField
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{
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NSLog(@"编辑完成");
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}
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//点击键盘调用
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- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
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{
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NSLog(@"点击键盘调用");
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return YES;
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}
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//点击清空按钮
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- (BOOL)textFieldShouldClear:(UITextField *)textField
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{
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NSLog(@"清空");
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_label.text = @"";
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return YES;
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}
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/**
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* 计算字符串长度，UILabel自适应高度
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*
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* @param text 需要计算的字符串
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* @param size 字号大小
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* @param width 最大宽度
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*
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* @return 返回大小
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*/
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-(CGSize)labelText:(NSString *)text fondSize:(float)size width:(CGFloat)width
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{
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NSDictionary *send = @{NSFontAttributeName: [UIFont systemFontOfSize:size weight:UIFontWeightMedium]};
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CGSize textSize = [text boundingRectWithSize:CGSizeMake(width, 0)
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options:NSStringDrawingTruncatesLastVisibleLine |
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NSStringDrawingUsesLineFragmentOrigin |
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NSStringDrawingUsesFontLeading
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attributes:send context:nil].size;
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return textSize;
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}
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/*
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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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- (void)drawRect:(CGRect)rect {
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// Drawing code
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}
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*/
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@end
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