在NSArray中搜索字符串

NSArray *array = @[@"搜索字符串", @"其他元素", @"另一个搜索字符串"];

for (NSUInteger i = 0; i < array.count; i++) {
    id item = array[i];
    
    if ([item isEqualToString:searchString]) {
        NSLog(@"找到搜索字符串 %@ 在数组中的位置: %lu", searchString, i);
    }
}

dispatch_queue_t queue = dispatch_queue_create("com.example.searches", DISPATCH_QUEUE_SERIAL);

__block NSMutableString *searchString = [[NSMutableString alloc] initWithString:@"搜索字符串"];
__block NSMutableString *resultString = [[NSMutableString alloc] init];

dispatch_async(queue, ^{
    for (NSUInteger i = 0; i < array.count; i++) {
        id item = array[i];
        
        [searchString appendString:item];
        
        if ([searchString isEqualToString:resultString]) {
            NSLog(@"找到搜索字符串 %@ 在数组中的位置: %lu", searchString, i);
        }
    }
});

dispatch_release(queue);

NSUInteger index = [array indexOfObjectIdenticalTo:searchString];
if (index != NSNotFound) {
    NSLog(@"找到搜索字符串 %@ 在数组中的位置: %lu", searchString, index);
} else {
    NSLog(@"搜索字符串 %@ 不在数组中", searchString);
}