Objective-C搜索字符串的NSArray？

Question

我有一個字符串數組。

我怎麼能夠找出一個字符串是在一個數組中的索引？

Answer 1

-[NSArray indexOfObject:]

Answer 2

雖然很老，但這個問題在談到谷歌的搜索相當高。這裏是一個使用版塊，

- (void)testSearch 
{ 
    NSArray *hashAlgorithms = @[@"SHA1", @"SHA2", @"SHA256", @"SHA384", @"SHA512"]; 
    NSString *searchFor = @"SHA384"; 
    __block NSInteger index = NSNotFound; 
    [hashAlgorithms enumerateObjectsUsingBlock:^(id alg, NSUInteger idx, BOOL *stop) { 
     if ([alg compare:searchFor options:NSCaseInsensitiveSearch] == NSOrderedSame) { 
      NSLog(@"Found: %@", searchFor); 
      *stop = YES; 
      index = idx; 
     } else { 
      NSLog(@"NOT Equal: %@", alg); 
     } 
    }]; 

    if (index == NSNotFound) { 
     NSLog(@"Not found. %li", (long)index); 
    } else { 
     NSLog(@"Found at: %li", (long)index); 
    } 
}