在server不支持昵称保存昵称的时候，我们就要对表情符号进行过滤掉，不仅仅需要过滤掉系统的表情，还有输入法的表情，简单来说就是所有的表情
// 是否包含表情符号
+ (BOOL)isContainsTwoEmoji:(NSString *)string
{
__block BOOL isEomji = NO;
[string enumerateSubstringsInRange:NSMakeRange(0, [string length]) options:NSStringEnumerationByComposedCharacterSequences usingBlock:
^(NSString *substring, NSRange substringRange, NSRange enclosingRange, BOOL *stop) {
const unichar hs = [substring characterAtIndex:0];
// NSLog(@"hs++++++++%04x",hs);
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;
}
// NSLog(@"uc++++++++%04x",uc);
}
} else if (substring.length > 1) {
const unichar ls = [substring characterAtIndex:1];
if (ls == 0x20e3|| ls ==0xfe0f) {
isEomji = YES;
}
// NSLog(@"ls++++++++%04x",ls);
} else {
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;
}
在输入框的代理方法做如下判断
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
//不支持系统表情的输入
if ([NSString isContainsTwoEmoji:string]) {
return NO;
}
return YES;
}
