I have the same problem. It is strange that this happens only in 3.5inch devices (ip4, ip4S), os7.x. works great on ip5.
UPDATE: our team has found the root cause. This is because we use this animation in code.
[UIView animateWithDuration:0.4f delay:0 usingSpringWithDamping:0.5f initialSpringVelocity:0.3f options:UIViewAnimationOptionCurveEaseOut animations:^{
self.transform = CGAffineTransformMakeScale(sx,sy);
} completion:^(BOOL finished) {
self.hidden = !visible;
}];
to fix the error, we avoid running the animation if iOS <8.0
if (floor(NSFoundationVersionNumber) > NSFoundationVersionNumber_iOS_7_1) {
[UIView animateWithDuration:0.4f delay:0 usingSpringWithDamping:0.5f initialSpringVelocity:0.3f options:UIViewAnimationOptionCurveEaseOut animations:^{
self.transform = CGAffineTransformMakeScale(sx,sy);
} completion:^(BOOL finished) {
if (finished) {
self.hidden = !visible;
}
}];
} else {
self.transform = CGAffineTransformMakeScale(sx,sy);
self.hidden = !visible;
}
Hope this help!