另一个 View 范围内的 iOS View

Question

我正在尝试检查一个 View 是否在另一个 View 的范围内以执行某些操作。这是我的代码:

CGRect movingView = [self.viewController.view convertRect:recognizer.view.frame toView:self.viewController.view];

for (NSUInteger i = 0; i < arrayOfViewsToCheck.count; i++)
{
    UIView *view = resultArray [0];

    CGRect boxframe = [self.viewController.view convertRect:view.frame toView:self.viewController.view];

    if (CGRectIntersectsRect(movingView.frame, view.frame) )
    {
        isInBounds = YES;
    }
}

但是当我执行我的代码时，例如我有这两个 View :

(CGRect) $6 = origin=(x=569, y=513) size=(width=76, height=100)

(CGRect) $7 = origin=(x=358, y=520) size=(width=116, height=100)

在彼此的范围内，但我不知道我做错了什么，因为它们似乎不在我的代码中。

如果可以让我知道我在尝试检测 View 是否在彼此的边界内做错了什么，我将不胜感激

Answer 1

您对 CGRectIntersectsRect 的使用是正确的，但示例中的矩形实际上并不相交。它们的外观如下:

- (void)viewDidLoad
{
    [super viewDidLoad];

    CGRect rect1 = CGRectMake(569,513,76,100);
    CGRect rect2 = CGRectMake(368,520,116,100);

    UIView *view1 = [[UIView alloc] initWithFrame:rect1];
    UIView *view2 = [[UIView alloc] initWithFrame:rect2];

    view1.backgroundColor = [UIColor redColor];
    view2.backgroundColor = [UIColor blueColor];

    [self.view addSubview:view1];
    [self.view addSubview:view2];
}

稍微修改后的版本:

- (void)viewDidLoad
{
    [super viewDidLoad];

    CGRect rect1 = CGRectMake(469,513,76,100); /* Note 469 instead of 569 */
    CGRect rect2 = CGRectMake(368,520,116,100);

    UIView *view1 = [[UIView alloc] initWithFrame:rect1];
    UIView *view2 = [[UIView alloc] initWithFrame:rect2];

    view1.backgroundColor = [UIColor redColor];
    view2.backgroundColor = [UIColor blueColor];

    [self.view addSubview:view1];
    [self.view addSubview:view2];

    if (CGRectIntersectsRect(rect1, rect2) ) {
        NSLog(@"Yay we intersect!");
    }
}