iOS禁止输入emoji表情

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iOS禁止输入emoji表情

有朋友在询问,如何屏蔽emoji表情输入的问题,因为苹果自带的表情在其他设备上不支持。

思路,在textfeild或者textview中,键入时候先判读是不是emoji的内容,如果是,就不返回给编辑框。

代码如下:

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range

replacementString:(NSString*)string{ DLog(@"[[UITextInputMode currentInputMode]primaryLanguage] is %@",);

if ([[[UITextInputMode currentInputMode]primaryLanguage] isEqualToString:@"emoji"]) {

return NO;

}

return YES;

2/

因为emoji编码在android或者pc设备没有很好的支持,所以有时候为了禁止emoji表情的输入,因为关闭不了系统emoji的键盘,那只能根据编码把emoji表情过滤掉,写了一个NSString的拓展,用来判断是不是emoji编码:

@implementation NSString(Emoji)

+(BOOL)isContainsEmoji:(NSString *)string {

__block BOOL isEomji = NO;

[string enumerateSubstringsInRange:NSMakeRange(0,

[string length]) options:NSStringEnumerationByComposedCharacterSequencesusi ngBlock:

^(NSString *substring, NSRange substringRange, NSRange enclosingRange, BOOL *stop) {

const unichar hs = [substring characterAtIndex:0];

// surrogate pair

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) {

isEomji = YES;

}

}

} else if (substring.length > 1) {

const unichar ls = [substring characterAtIndex:1];

if (ls == 0x20e3) {

isEomji = YES;

}

} else {

// non surrogate

if (0x2100 <= hs && hs <= 0x27ff && hs != 0x263b) {

isEomji = YES;

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

isEomji = YES;

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

isEomji = YES;

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

isEomji = YES;

} else if (hs == 0xa9 || hs == 0xae || hs == 0x303d || hs

== 0x3030 || hs == 0x2b55 || hs == 0x2b1c || hs == 0x2b1b || hs == 0x2b50|| hs == 0x231a ) {

isEomji = YES;

}

}

}];

return isEomji;

}

这样在textview或textfield的delegate判断一下,即可禁止输入emoji,如下:

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range

replacementString:(NSString *)string

{

//emoji无效

if([NSString isContainsEmoji:string])

{

return NO;

}

}

3/

思路:禁用了表情键盘

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRang e:(NSRange)range replacementString:(NSString*)string{

DLog(@"[[UITextInputMode currentInputMode]primaryLanguage] is %@",); if ([[[UITextInputMode currentInputMode]primaryLanguage] isEqualToSt ring:@"emoji"]) {

return NO;

}

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