// 过滤所有表情
- (BOOL)stringContainsEmoji:(NSString *)string {
__block BOOL returnValue = NO;
[string enumerateSubstringsInRange:NSMakeRange(0, [string length]) options:NSStringEnumerationByComposedCharacterSequences usingBlock:
^(NSString *substring, NSRange substringRange, NSRange enclosingRange, BOOL *stop) {
const unichar hs = [substring characterAtIndex:0];
// surrogate pair
if (0xd800 <= hs && hs 1) {
const unichar ls = [substring characterAtIndex:1];
const int uc = ((hs - 0xd800) * 0x400) + (ls - 0xdc00) + 0x10000;
if (0x1d000 <= uc && uc 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;
}
- (void)textViewDidChange:(UITextView *)textView {
_limitLabel.text = [NSString stringWithFormat:@"%ld/500",textView.text.length ];
}
- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text{
NSLog(@"textLength == %ld",textView.text.length);
if ([text isEqualToString:@"\n"]){ //判断输入的字是否是回车，即按下return
[self.textView resignFirstResponder];
return NO;
}
if ([self stringContainsEmoji:text] == YES) {
[PubllicMaskViewHelper showTipViewWith:@"不支持输入Emoji表情符号" inSuperView:self withDuration:1];
return NO;
}
if (textView.text.length + text.length > 500) {
NSString *allText = [NSString stringWithFormat:@"%@%@",textView.text,text];
textView.text = [allText substringToIndex:500];
[PubllicMaskViewHelper showTipViewWith:@"输入不能超过500个字" inSuperView:self withDuration:1];
return NO;
}
return YES;
}