从一个数组中过滤出另一个数组,代码片段:
NSMutableArray *filteredArray = [ [NSMutableArray alloc] initWithCapacity:1];
[wordsArray enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop)
{
NSString *currentWord = (NSString *)obj;
if(([currentWord length]>=4 && [currentWord length]<=6) && [currentWord rangeOfString:@" "].location == NSNotFound)
{
[filteredArray addObject:currentWord];
}
}];
代码实现的很成功,但是我想如果用 filteredArrayUsingPredicate: 是不是会完成的更好一点?
应该怎么用 NSPredicate来代替 [currentWord length]>=4 && [currentWord length]<=6) && [currentWord rangeOfString:@" "].location == NSNotFound ?