限制输入金额的输入框 支付时输入框
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
NSIndexPath *amountIndexPath = nil;
if (self.accountBookmodel)
{
amountIndexPath = [NSIndexPath indexPathForRow:0 inSection:2];
}else
{
amountIndexPath = [NSIndexPath indexPathForRow:0 inSection:1];
}
//NSIndexPath *amountIndexPath = [NSIndexPath indexPathForRow:0 inSection:2];
LHChargeAccountTableViewCell *amountCell = [self.tableView cellForRowAtIndexPath:amountIndexPath];
if (textField == amountCell.detailTextField) {
_isHaveDian=NO;
if ([textField.text rangeOfString:@"."].location!=NSNotFound) {
_isHaveDian = YES;
}
if ([textField.text rangeOfString:@"0"].location==NSNotFound) {
_isFirstZero = NO;
}
if ([string length]>0)
{
unichar single=[string characterAtIndex:0];//当前输入的字符
if ((single >='0' && single<='9') || single=='.')//数据格式正确
{
if ([textField.text length] > 15)
{
return NO;
}
if([textField.text length]==0){
if(single == '.'){
//首字母不能为小数点
return NO;
}
if (single == '0') {
_isFirstZero = YES;
return YES;
}
}
if (single=='.'){
if(!_isHaveDian)//text中还没有小数点
{
_isHaveDian=YES;
return YES;
}else{
return NO;
}
}else if(single=='0'){
if ((_isFirstZero&&_isHaveDian)||(!_isFirstZero&&_isHaveDian)) {
//首位有0有.（0.01）或首位没0有.（10200.00）可输入两位数的0
if([textField.text isEqualToString:@"0.0"]){
return NO;
}
NSRange ran=[textField.text rangeOfString:@"."];
int tt=(int)(range.location-ran.location);
if (tt <= 2){
return YES;
}else{
return NO;
}
}else if (_isFirstZero&&!_isHaveDian){
//首位有0没.不能再输入0
return NO;
}else{
return YES;
}
}else{
if (_isHaveDian){
//存在小数点，保留两位小数
NSRange ran=[textField.text rangeOfString:@"."];
int tt= (int)(range.location-ran.location);
if (tt <= 2){
return YES;
}else{
return NO;
}
}else if(_isFirstZero&&!_isHaveDian){
//首位有0没点
return NO;
}else{
return YES;
}
}
}else{
//输入的数据格式不正确
return NO;
}
}else{
return YES;
}
}
return YES;
}
限制textField输入字数 包含中文、字母
- (void)tfDidChange:(UITextField *)textField
{
NSInteger max_length = 10;
NSString *toBeString = textField.text;
NSString *lang = [textField.textInputMode primaryLanguage];
if ([lang isEqualToString:@"zh-Hans"])// 简体中文输入
{
//获取高亮部分
UITextRange *selectedRange = [textField markedTextRange];
UITextPosition *position = [textField positionFromPosition:selectedRange.start offset:0];
// 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
if (!position)
{
if (toBeString.length > max_length)
{
textField.text = [toBeString substringToIndex:max_length];
}
}
}
// 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
else
{
if (toBeString.length > max_length)
{
NSRange rangeIndex = [toBeString rangeOfComposedCharacterSequenceAtIndex:max_length];
if (rangeIndex.length == 1)
{
textField.text = [toBeString substringToIndex:max_length];
}
else
{
NSRange rangeRange = [toBeString rangeOfComposedCharacterSequencesForRange:NSMakeRange(0, max_length)];
textField.text = [toBeString substringWithRange:rangeRange];
}
}
}
}
普通字母 输入限制
- (void)tfDidChange:(UITextField *)textField
{
if (textField == _phoneTextField) {
if (textField.text.length > 11)
{
[MyAlert showMsg:@"联系方式最多能输入11位" cancelDelay:1.5];
textField.text = [textField.text substringToIndex:11];
}
}
}
限制输入字母+数字 不能输入标点
-(BOOL)textField:(UITextField*)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString*)string{
if (_myIndexPath.row == 2) {
NSUInteger lengthOfString = string.length;
//lengthofstring的值始终是1
for (NSInteger loopIndex = 0; loopIndex < lengthOfString; loopIndex++) {
unichar character = [string characterAtIndex:loopIndex];
//将输入的值转化为ASCII值（即内部索引值），可以参考ASCII表
// 48-57;{0,9};65-90;{A..Z};97-122:{a..z}
if (character < 48) {
return NO;
}
if (character > 57 && character < 65) {
return NO;
}
if (character > 90 && character < 97) {
return NO;
}
if (character > 122) {
return NO;
}
}
//限制长度
NSUInteger proposedNewLenght = textField.text.length - range.length + string.length;
if (proposedNewLenght > 18) {
[MyAlert showMsg:@"纳税人识别号不能超过18位" cancelDelay:1];
return NO;
}
return YES;
}
return YES;
}
小写字母转大写字母
- (void)textFieldDidEndEditing:(UITextField *)textField {
textField.text = [textField.text uppercaseString];
}
禁止输入空格
- (void)textFieldChange:(UITextField *)textField
{
textField.text =[textField.text stringByReplacingOccurrencesOfString:@" " withString:@""];
}
去除字符串前后空格
NSString *str = @" ds re 43 ";
str = [str stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
//替换后的str：@"ds re 43"
限制开头不能输入空格
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
if ([string isEqualToString:@" "])
{
return NO;
}
return YES;
}
限制textView输入字数 包含字数提示_statusLabel
- (void)textViewDidChangeSelection:(UITextView *)textView{
NSInteger maxLength = 30;
NSString *toBeString = textView.text;
NSString *lang = [textView.textInputMode primaryLanguage];
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
UITextRange *selectedRange = [textView markedTextRange];
UITextPosition *position = [textView positionFromPosition:selectedRange.start offset:0];
// 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
if (!position) {
if (toBeString.length > maxLength) {
textView.text = [toBeString substringToIndex:maxLength];
}
self.numLabel.text = [NSString stringWithFormat:@"%lu/30",textView.text.length];
}
// 有高亮选择的字符串，则暂不对文字进行统计和限制
else{
}
}else {// 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
if (toBeString.length > maxLength) {
textView.text = [toBeString substringToIndex:maxLength];
}
self.numLabel.text = [NSString stringWithFormat:@"%lu/30",textView.text.length];
}
}
