我在viewDidLoad
和didRotateFromInterfaceOrientation
-(void) makeBox{
[self.view1 removeFromSuperview];
float viewWidth = CGRectGetWidth(self.view.frame);
float viewHeight = CGRectGetHeight(self.view.frame);
float startx = (viewWidth / 100) * 10;
float starty = (viewHeight /100) * 20;
float width = (viewWidth / 100) * 80;
float height = (viewHeight /100) * 60;
CGRect frame1 = CGRectMake(startx, starty, width, height);
self.view1 = [[UIView alloc] initWithFrame:frame1];
[self.view1 setBackgroundColor:[UIColor redColor]];
[self.view addSubview:self.view1];
}
当视图发生变化时,它非常'粗略'和根本不是很优雅。我正在使用模拟器,但我认为如果我在设备上运行它将是相同的。 我如何才能使这种过渡变得更加顺畅?我会发布到用户体验页面,但我希望以编程方式进行此操作
除了学习之外,这一点的总体意义是从代码中获得与方向无关的图形(没有自动布局)。
答案 0 :(得分:1)
如果只是你正在改变的话,那么就不需要移除视图并创建一个具有所需帧的新视图。只需就地修改视图框架:
- (void)makeBox {
CGFloat viewWidth = CGRectGetWidth(self.view.frame);
CGFloat viewHeight = CGRectGetHeight(self.view.frame);
CGFloat startx = (viewWidth / 100) * 10;
CGFloat starty = (viewHeight /100) * 20;
CGFloat width = (viewWidth / 100) * 80;
CGFloat height = (viewHeight /100) * 60;
CGRect view1Frame = CGRectMake(startx, starty, width, height);
if (!self.view1) {
// The view doesn't exists yet, we create it
self.view1 = [[UIView alloc] initWithFrame:view1Frame];
[self.view1 setBackgroundColor:[UIColor redColor]];
[self.view addSubview:self.view1];
}
else {
// Just update the frame
self.view1.frame = view1Frame;
}
}
对于非常好的UX,将帧更新包装在动画块中:
// ... snip ...
else {
[UIView animateWithDuration:0.3 animations:^() {
self.view1.frame = view1Frame;
}];
}