最近在做項目遇到一個問題，用戶在輸入信息是時候脚祟，帶有表情的話绍在，服務器那邊會出現(xiàn)亂碼感帅，后來決定禁止用戶輸入表情，在網(wǎng)上搜了下面的方法：
+ (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];
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 {
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;
}
但是后來發(fā)現(xiàn)這個方法沒法監(jiān)聽到鍵盤聯(lián)想提示的emoji表情地淀，很可惱失球，最后只能監(jiān)聽textView文本變化，然后判斷里面是否有emoji表情帮毁，再把它替換了 下面是實現(xiàn)代碼：
+ (NSString *)disableEmoji:(NSString *)text
{
NSRegularExpression *regular = [[NSRegularExpression alloc] initWithPattern:@"[^\\u0020-\\u007E\\u00A0-\\u00BE\\u2E80-\\uA4CF\\uF900-\\uFAFF\\uFE30-\\uFE4F\\uFF00-\\uFFEF\\u0080-\\u009F\\u2000-\\u201f\r\n]" options:NSRegularExpressionCaseInsensitive error:nil];
NSString *modifiedString = [regular stringByReplacingMatchesInString:text options:NSMatchingReportProgress range:NSMakeRange(0, [text length]) withTemplate:@""];
return modifiedString;
}
調(diào)用：
#pragma mark - UITextViewDelegate
- (void)textViewDidChange:(UITextView *)textView {
UITextRange *textTange = textView.selectedTextRange;
if (![textView.text isEqualToString:[NSString disableEmoji:textView.text]]) {
textView.text = [NSString disableEmoji:textView.text];
}
textView.selectedTextRange = textTange;
}
這樣就能比較完美的替換鍵盤輸入的emoji表情了实苞，另外我很想知道簡書是怎么樣排版代碼的！烈疚？
