how to override/swizzle a method of a private class in runtime objective-c?

Question

To give a bit of context of why I\'m asking this: basically I would like to change the location of the myLocationButton of the google map on iOS. So I first fet

Answer 1

this did it.. i'm not sure if this counts as an actual answer since i just got around the problem by simply calling [self layoutIfNeeded] instead of [self layoutSubviews]

void _autolayout_replacementLayoutSubviews(id self, SEL _cmd)
{
    // calling super
    struct objc_super superTarget;
    superTarget.receiver = self;
    superTarget.super_class = class_getSuperclass(object_getClass(self));
    objc_msgSendSuper(&superTarget, @selector(layoutSubviews));

    // to get around calling layoutSubviews and having
    // a recursive call
    [self layoutIfNeeded];

    objc_msgSendSuper(&superTarget, @selector(layoutSubviews));
}

- (void)replaceGMSUISettingsViewImplementation
{
    class_addMethod(NSClassFromString(@"GMSUISettingsView"), @selector(_autolayout_replacementLayoutSubviews), (IMP)_autolayout_replacementLayoutSubviews, "v@:");

    Method existing = class_getInstanceMethod(NSClassFromString(@"GMSUISettingsView"), @selector(layoutSubviews));
    Method new = class_getInstanceMethod(NSClassFromString(@"GMSUISettingsView"), @selector(_autolayout_replacementLayoutSubviews));

    method_exchangeImplementations(existing, new);
}