Question

我的UIButton视图中只有一个UIViewController。我还在主视图中的subview中还有十个。我想找到所有这些按钮。到目前为止，我有：

-(void)findAllButtons{

    for(UIView *view in self.view.subviews) {
        if ([view isKindOfClass:[myButton class]]){
            NSLog(@"found a button!");         
        }
    }
}

虽然只找到了单个按钮而不是其他十个按钮。这是为什么？不应该迭代每一个subview，然后找到它们吗？

Answer 1

使用像这样的Objective-C块的递归函数将查找给定子类类型的所有视图，如给定视图的视图层次结构中的测试块中指定的那样：

NSMutableArray *marrAllButtons = [NSMutableArray new];

BOOL (^viewTest)(UIView*) = ^BOOL(UIView* viewToTest) {

    return [view isKindOfClass:[UIButton class]];
};

void(^viewEnumerator)(UIView*) = ^(UIView* outerView){

    for (UIView *view in outerView.subviews)
    {
        if (viewTest(view))
        {
            [marrAllButtons addObject:view];
        }
        else
        {
            viewEnumerator(view);
        }
    }
};

viewEnumerator(self.view);

NSLog(@"All Buttons %@", marrAllButtons);

Answer 2

只需几行代码

-(void)findAllButtons {
    [self findButtonsInSubviews:self.view.subviews];
}

- (void)findButtonsInSubviews:(NSArray *)subviews {
    for(UIView *view in subviews) {
        if ([view isKindOfClass:[UIButton class]]){
            NSLog(@"found a button!");
        } else {
            [self findButtonsInSubviews:view.subviews];
        }
    }
}

Answer 3

- (NSMutableArray *)buttonsInView:(UIView *)view
{
    NSArray *subviews = view.subviews;
    NSMutableArray *buttons = [NSMutableArray array];

    for (UIView *subview in subviews)
    {
        if ([subview isKindOfClass:[UILabel class]])
        {
            [buttons addObject:subview];
        }
        else if(subview.subviews)
        {
            [buttons addObjectsFromArray:[self buttonsInView:subview]];
        }
    }
    return buttons;
}

Answer 4

如果您的所有按钮已经在 self.view（主视图）中，您的方法是正确的。

设置标记 所有按钮以检查并确保所有按钮位于主视图。我希望这会奏效。

-(void)findAllButtons{

for(UIView *view in self.view.subviews) {
    if ([view isKindOfClass:[myButton class]]){
       UIButton *button = (UIButton*)view;
        NSLog(@"found a button with tag:%d",button.tag);         
    }
  }
}

Answer 5

for(UIView * subView in view.subviews) // here write Name of you ScrollView.

 {

     // NSLog(@"test %@", [subView class]);

                    if([subView isKindOfClass:[UIButton class]])

                    {

                        UIButton *button = (UIButton*)subView;

                        [button setSelected:NO] ;


NSString *s1;

s1 = @",";

s1 = [s1 stringByAppendingString:[NSString stringWithFormat:@"%@",button.titleLabel.text ]];


s1 = [s1 stringByAppendingString:[NSString stringWithFormat:@"%@",@"," ]];


                   NSRange range = [temp_Colors_Name_comma rangeOfString:s1  ];

                        if(range.location == NSNotFound)

                        {



                        }

                        else

                        {

                            [button setSelected:YES];


                        }

                    }

                }

查找子视图中的所有UIButtons

6 个答案: