IOStextfield limits the length of input characters and filters emojis,

IOStextfield limits the length of input characters and filters emojis,

// Add a modification box

-(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 = @ "remark name ";

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 (0.5, IPHONE_WIDTH,)];

LineViewlight3.backgroundColor = kColor (200,200,200 );

LineViewlight3.alpha = 0.8;

[View addSubview: lineViewlight3];

UIView * lineViewlight4 = [[UIView alloc] initWithFrame: CGRectMake (0.5 * KWIDTH-0.5, IPHONE_WIDTH,)];

LineViewlight4.backgroundColor = kColor (200,200,200 );

LineViewlight4.alpha = 0.7;

[View addSubview: lineViewlight4];

View. backgroundColor = [UIColor whiteColor];

_ NameField = [[UITextField alloc] initWithFrame: CGRectMake (10 * KWIDTH, 0, IPHONE_WIDTH-15 * KWIDTH, 40 * KWIDTH)];

_ NameField. text = self. NameField;

_ NameField. borderStyle = UITextBorderStyleNone;

_ NameField. clearButtonMode = UITextFieldViewModeAlways;

[[Nsicationcenter center defacenter center] addObserver: selfselector: @ selector (textFiledEditChanged :)

Name: @ "UITextFieldTextDidChangeNotification"

Object: _ nameField];

[View addSubview: _ nameField];

[Self. view addSubview: view];

}

 

 

-(Void) textFiledEditChanged :( NSNotification *) obj {

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

// Filter out the system expression

// UITextView * textView;

//

// Nsange 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]; // keyboard input mode

If ([lang isw.tostring: @ "zh-Hans"]) {// Simplified Chinese input, including simplified Chinese pinyin, five strokes for fitness, and simplified handwriting

UITextRange * selectedRange = [textField markedTextRange];

// Obtain the highlighted part

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

// If no selected words are highlighted, the words that have been entered are counted and restricted.

If (! Position ){

If (toBeString. length> kHZMaxLength ){

TextField. text = [toBeString substringToIndex: kHZMaxLength];

_ ShowStr = [toBeString substringToIndex: kHZMaxLength];

}

}

// If a highlighted string exists, no text statistics and restrictions are imposed.

Else {

}

}

// Statistical restrictions can be directly imposed on Chinese input methods, regardless of other languages

Else {

If (toBeString. length> kEGMaxLength ){

TextField. text = [toBeString substringToIndex: kEGMaxLength];

_ ShowStr = [toBeString substringToIndex: kEGMaxLength];

}

}

DSLog (@ "_ showStr % @", _ showStr );

If (isEmoj ){

If ([_ showStr length]) {

TextField. text = _ showStr;

 

} Else {

TextField. text = toBeString;

}

}

}

 

// Determine whether the NSString contains emoji

-(BOOL) stringContainsEmoji :( NSString *) string

{

_ Block BOOL returnValue = NO;

[String enumerateSubstringsInRange: NSMakeRange (0, [string length]) options: NSStringEnumerationByComposedCharacterSequences usingBlock: ^ (NSString * substring, nsange substringRange, nsange enclosingRange, BOOL * stop ){

Const unichar hs = [substring characterAtIndex: 0];

// Surrogate pair

If (0xd800 ){

If (0xd800 <= hs & hs <= 0 xdbff ){

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 --- filter emoticon

 

-(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 = [regex stringByReplacingMatchesInString: text

Options: 0

Range: NSMakeRange (0, [text length])

WithTemplate: @ ""];

Return modifiedString;

}