iOStextfield 限制输入字符长度和过滤表情符号 - CSDN.NET

快来打我* 2022-06-09 02:37 196阅读 0赞

# iOStextfield 限制输入字符长度和过滤表情符号  #

//增加修改框

\-(void)creatSaveView\{

UILabel \* lab = \[\[UILabel alloc\]init\];

if (self.searchType == 1) \{

lab.frame = CGRectMake(14, 8 \* KWIDTH + 64, IPHONE\_WIDTH\- 100, 16 \* KWIDTH);

\}else\{

lab.frame = CGRectMake(14, 8 \* KWIDTH, IPHONE\_WIDTH - 100, 16 \* KWIDTH);

lab.text = @"备注名";

lab.font = \[UIFont systemFontOfSize:14\];

lab.textColor = kColor(137, 137, 137);

\[self.view addSubview:lab\];

UIView \*view=\[\[UIView alloc\] init\];

if (self.searchType == 1) \{

view.frame = CGRectMake(0, 32\*KWIDTH + 64, IPHONE\_WIDTH,40\*KWIDTH);

\}else\{

view.frame = CGRectMake(0, 32\*KWIDTH, IPHONE\_WIDTH, 40\*KWIDTH);

UIView \*lineViewlight3=\[\[UIView alloc\] initWithFrame:CGRectMake(0,0, IPHONE\_WIDTH, 0.5)\];

lineViewlight3.backgroundColor=kColor(200,200 , 200);

lineViewlight3.alpha=0.8;

\[view addSubview:lineViewlight3\];

UIView \*lineViewlight4=\[\[UIView alloc\] initWithFrame:CGRectMake(0, 40\*KWIDTH\-0.5, IPHONE\_WIDTH, 0.5)\];

lineViewlight4.backgroundColor=kColor(200,200 , 200);

lineViewlight4.alpha=0.7;

\[view addSubview:lineViewlight4\];

view.backgroundColor=\[UIColor whiteColor\];

\_nameField = \[\[UITextFieldalloc\]initWithFrame:CGRectMake(10\*KWIDTH, 0, IPHONE\_WIDTH\-15\*KWIDTH, 40\*KWIDTH)\];

\_nameField.text = self.NameField;

\_nameField.borderStyle = UITextBorderStyleNone;

\_nameField.clearButtonMode= UITextFieldViewModeAlways;

\[\[NSNotificationCenter defaultCenter\]addObserver:selfselector:@selector(textFiledEditChanged:)

name:@"UITextFieldTextDidChangeNotification"

object:\_nameField\];

\[view addSubview:\_nameField\];

\[self.view addSubview:view\];

\-(void)textFiledEditChanged:(NSNotification\*)obj\{

UITextField \*textField = (UITextField \*)obj.object;

//过滤掉系统表情

//    UITextView \* textView;

//    NSRange textRange = \[textView selectedRange\];

//    \[textView setText:\[self disable\_emoji:\[textView text\]\]\];

//    \[textView setSelectedRange:textRange\];

NSString \*toBeString = textField.text;

DSLog(@"-----toBeString  1  ----%@",toBeString);

BOOL isEmoj = \[self stringContainsEmoji:toBeString\];

NSString \* \_showStr;

toBeString = \[self disable\_emoji:toBeString\];

//    textField.text = toBeString;

DSLog(@"-----toBeString   2  -----%@",toBeString);

NSString \*lang = \[\[UITextInputMode currentInputMode\] primaryLanguage\]; // 键盘输入模式

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 = \[textFieldmarkedTextRange\];

//获取高亮部分

UITextPosition \*position = \[textFieldpositionFromPosition:selectedRange.start offset:0\];

//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 > kHZMaxLength) \{

textField.text = \[toBeStringsubstringToIndex:kHZMaxLength\];

\_showStr = \[toBeString substringToIndex:kHZMaxLength\];

//有高亮选择的字符串，则暂不对文字进行统计和限制

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

else\{

if(toBeString.length > kEGMaxLength) \{

textField.text= \[toBeStringsubstringToIndex:kEGMaxLength\];

\_showStr = \[toBeString substringToIndex:kEGMaxLength\];

DSLog(@"   \_showStr   %@",\_showStr);

if (isEmoj) \{

if (\[\_showStr length\]) \{

textField.text = \_showStr;

\}else\{

textField.text = toBeString;

//判断NSString字符串是否包含emoji表情

\- (BOOL)stringContainsEmoji:(NSString \*)string

\_\_block BOOL returnValue =NO;

\[string enumerateSubstringsInRange:NSMakeRange(0, \[string length\]) options:NSStringEnumerationByComposedCharacterSequencesusingBlock:^(NSString \*substring, NSRange substringRange,NSRange enclosingRange, BOOL \*stop) \{

const unichar hs = \[substring characterAtIndex:0\];

// surrogate pair

if (0xd800) \{

if (0xd800 <= hs && hs <= 0xdbff) \{

if (substring.length > 1) \{

const unichar ls = \[substring characterAtIndex:1\];

const int uc = ((hs - 0xd800) \* 0x400) + (ls - 0xdc00) + 0x10000;

if (0x1d000 <= uc && uc <= 0x1f77f) \{

returnValue =YES;

\}else if (substring.length > 1) \{

const unichar ls = \[substring characterAtIndex:1\];

if (ls == 0x20e3) \{

returnValue =YES;

\}else \{

// non surrogate

if (0x2100 <= hs && hs <= 0x27ff) \{

returnValue =YES;

\}else if (0x2B05 <= hs && hs <= 0x2b07) \{

returnValue =YES;

\}else if (0x2934 <= hs && hs <= 0x2935) \{

returnValue =YES;

\}else if (0x3297 <= hs && hs <= 0x3299) \{

returnValue =YES;

\}else if (hs == 0xa9 || hs == 0xae || hs == 0x303d || hs == 0x3030 || hs == 0x2b55 || hs == 0x2b1c || hs == 0x2b1b || hs == 0x2b50) \{

returnValue =YES;

\}\];

return returnValue;

\#pragma Mark   ---  过滤表情

\- (NSString \*)disable\_emoji:(NSString \*)text

NSRegularExpression \*regex = \[NSRegularExpressionregularExpressionWithPattern:@"\[^\\\\u0020-\\\\u007E\\\\u00A0-\\\\u00BE\\\\u2E80-\\\\uA4CF\\\\uF900-\\\\uFAFF\\\\uFE30-\\\\uFE4F\\\\uFF00-\\\\uFFEF\\\\u0080-\\\\u009F\\\\u2000-\\\\u201f\\r\\n\]"options:NSRegularExpressionCaseInsensitive error:nil\];

NSString \*modifiedString = \[regexstringByReplacingMatchesInString:text

options:0

range:NSMakeRange(0, \[text length\])

withTemplate:@""\];

return modifiedString;