[IOS]字符串判断、移除emoji 表情

来源：互联网发布：javascript之父编辑：程序博客网时间：2024/05/21 09:21

使用方法：

  NSString *testString=@"？西瓜？苹果？橘子";    NSString *testStringno=@"西瓜苹果橘子";    NSLog(@"%@",testString);    NSLog(@"%@",testStringno);    BOOL isIncludingEmoji = [testString isIncludingEmoji];    BOOL isIncludingEmoji2 = [testStringno isIncludingEmoji];    NSLog(@"%d",isIncludingEmoji);    NSLog(@"%d",isIncludingEmoji2);    NSString* removedEmoji = [testString removedEmojiString];    NSLog(@"%@",removedEmoji);

————————————————————添加方法——————————————

//头文件#import <Foundation/Foundation.h>@interface NSString (RemoveEmoji)- (BOOL)isIncludingEmoji;- (instancetype)removedEmojiString;@end

m文件

#import "NSString+RemoveEmoji.h"@implementation NSString (RemoveEmoji)- (BOOL)isEmoji {    const unichar high = [self characterAtIndex: 0];        // Surrogate pair (U+1D000-1F77F)    if (0xd800 <= high && high <= 0xdbff) {        const unichar low = [self characterAtIndex: 1];        const int codepoint = ((high - 0xd800) * 0x400) + (low - 0xdc00) + 0x10000;                return (0x1d000 <= codepoint && codepoint <= 0x1f77f);            // Not surrogate pair (U+2100-27BF)    } else {        return (0x2100 <= high && high <= 0x27bf);    }}- (BOOL)isIncludingEmoji {    BOOL __block result = NO;        [self enumerateSubstringsInRange:NSMakeRange(0, [self length])                             options:NSStringEnumerationByComposedCharacterSequences                          usingBlock: ^(NSString* substring, NSRange substringRange, NSRange enclosingRange, BOOL* stop) {        if ([substring isEmoji]) {            *stop = YES;            result = YES;        }    }];        return result;}- (instancetype)removedEmojiString {    NSMutableString* __block buffer = [NSMutableString stringWithCapacity:[self length]];        [self enumerateSubstringsInRange:NSMakeRange(0, [self length])                             options:NSStringEnumerationByComposedCharacterSequences                          usingBlock: ^(NSString* substring, NSRange substringRange, NSRange enclosingRange, BOOL* stop) {        [buffer appendString:([substring isEmoji])? @"": substring];    }];        return buffer;}@end

楼主在github上爬到的。

附上地址:https://github.com/woxtu/NSString-RemoveEmoji

网速差的同学就看看我的吧：）

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