ios - UIView animatewithduration-iOS

Question

我正在尝试使用UIView animateWithDuration将标签从A点移动到B点，如下所示

    [UIView animateWithDuration:3 delay:0 options:UIViewAnimationTransitionNone animations:^(void){
        label.alpha = 1;
        label.center = CGPointMake(label.center.x , label.center.y +740);

        }completion:^(BOOL Finished){ 
         label.alpha = 0;
        label.center = CGPointMake(label.center.x , label.center.y - 740);]

一旦标签即将达到740，它就会减速。是否有可能使匀速运动到B点而不是放慢速度？

Answer 1

用这个:

[UIView animateWithDuration:3 delay:0 options:UIViewAnimationTransitionNone | UIViewAnimationOptionCurveLinear animations:^(void){ 
...