One of the more interesting ways I've found to animate views together.

some animation

CGRect endFrame1 = [_inputFields[0] frame];
CGRect endFrame2 = [_inputFields[1] frame];
CGRect startFrame1 = endFrame1;
CGRect startFrame2 = endFrame2;
startFrame1.origin.y -= 100;
startFrame2.origin.y -= 50;
    
CGRect *start = calloc(2, sizeof(CGRect));
start[0] = startFrame1;
start[1] = startFrame2;
CGRect *end = calloc(2, sizeof(CGRect));
end[0] = endFrame1;
end[1] = endFrame2;
    
[_inputFields enumerateObjectsUsingBlock:^(UITextField *obj, NSUInteger idx, BOOL *stop) {
    [obj setFrame:start[idx]];
    [obj setAlpha:0.0];
}];
    
[UIView animateWithDuration:0.6 delay:0.0 usingSpringWithDamping:1.0 initialSpringVelocity:0.5 options:UIViewAnimationOptionCurveEaseIn animations:^{
    [_inputFields enumerateObjectsUsingBlock:^(UITextField *obj, NSUInteger idx, BOOL *stop) {
        [obj setFrame:end[idx]];
        [obj setAlpha:1.0];
    }];
} completion:^(BOOL finished) {
    free(start);
    free(end);
}];