如何在数组中搜索元素(Objective-C)

NSArray *array = @[ @"apple", @"banana", @"orange" ];
NSUInteger index = [array indexOfObject:@"banana"];
if (index != NSNotFound) {
    NSLog(@"元素在数组中的索引为：%lu", (unsigned long)index);
} else {
    NSLog(@"元素未找到");
}

NSArray *array = @[ @"apple", @"banana", @"orange" ];
NSIndexSet *indexes = [array indexesOfObjectsPassingTest:^BOOL(id obj, NSUInteger idx, BOOL *stop) {
    return [obj isEqualToString:@"banana"];
}];
if (indexes.count > 0) {
    NSLog(@"元素在数组中的索引为：%@", indexes);
} else {
    NSLog(@"元素未找到");
}

NSArray *array = @[ @"apple", @"banana", @"orange" ];
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF == %@", @"banana"];
NSArray *filteredArray = [array filteredArrayUsingPredicate:predicate];
if (filteredArray.count > 0) {
    NSLog(@"元素在数组中");
} else {
    NSLog(@"元素未找到");
}