ios - 如何通过菜单按钮打开新的 View Controller ？

Question

我有一个菜单



它只显示选择按钮，但当我选择 Hello 2 打开 Hello2 View Controller 时我想要。

我的代码:

enter code here

 - (IBAction)selectClicked:(id)sender {
NSArray * arr = [[NSArray alloc] init];
arr = [NSArray arrayWithObjects:@"Hello 0", @"Hello 1", @"Hello 2", @"Hello 3", @"Hello   4", @"Hello 5", @"Hello 6", @"Hello 7", @"Hello 8", @"Hello 9",nil];
NSArray * arrImage = [[NSArray alloc] init];
arrImage = [NSArray arrayWithObjects:[UIImage imageNamed:@"apple.png"], [UIImage    imageNamed:@"apple2.png"], [UIImage imageNamed:@"apple.png"], [UIImage imageNamed:@"apple2.png"], [UIImage imageNamed:@"apple.png"], [UIImage imageNamed:@"apple2.png"], [UIImage imageNamed:@"apple.png"], [UIImage imageNamed:@"apple2.png"], [UIImage imageNamed:@"apple.png"], [UIImage imageNamed:@"apple2.png"], nil];
if(dropDown == nil) {
    CGFloat f = 200;
    dropDown = [[NIDropDown alloc]showDropDown:sender :&f :arr :arrImage :@"down"];
    dropDown.delegate = self;
}
else {
    [dropDown hideDropDown:sender];
    [self rel];
}
 }

-(void)rel{
//    [dropDown release];
  dropDown = nil;
 }

Answer 1

在选择表时调用委托(delegate)方法

- (void) niDropDownDelegateMethod: (NIDropDown *) sender 

找出从那里按下哪个选项并实现 push 方法

问题是代码没有提供获取所选值的方法。您必须查看该自定义类 NIDropDown并添加一个返回所选索引的值

解决方案

.h 添加

@property (nonatomic, assign) NSInteger *selectedIndex;

.m

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
     self.selectedIndex=indexPath.row;//Add this line
    [self myDelegate];
}

在 View Controller 中

- (void) niDropDownDelegateMethod: (NIDropDown *) sender {
    NSLog(@"%d",sender.selectedIndex);
}