如何使用UIView
的animateWithDuration
方法使UILabel
的宽度增加和减少,仅限于宽度?
非常感谢您的帮助。(到目前为止,我已经尝试了很多次,但都没有成功)
如何使用UIView
的animateWithDuration
方法使UILabel
的宽度增加和减少,仅限于宽度?
非常感谢您的帮助。(到目前为止,我已经尝试了很多次,但都没有成功)
你可以在UIView动画块中设置UILabel
的框架。像这样:
CGRect originalFrame = self.address.frame;
[UIView animateWithDuration:0.3
animations:^{
self.myLabel.frame = CGRectMake(0, 0, 100, 100);
}
completion:^(BOOL finished) {
// use similar UIView animation to resize back to original
}];
// original label frame CGRectMake( 0,0, 100,60 );
[UIView beginAnimations: @"moveLogo" context: nil];
[UIView setAnimationDelegate:self];
[UIView setAnimationDuration:1.0];
[UIView setAnimationCurve: UIViewAnimationCurveLinear];
[UIView setAnimationRepeatAutoreverses:YES];
[UIView setAnimationRepeatCount:4];
//increasing frame width
label.frame = CGRectMake( 0,0, 400,60 );
[UIView commitAnimations];
试试这个
[UIView animateWithDuration:0.6 animations:^(void)
{
self.label.bounds = CGRectMake(100, 100, 200, 100);
}completion:^(BOOL finished) {
[UIView animateWithDuration:0.6 animations:^(void)
{
self.label.bounds = CGRectMake(100, 100, 100, 100);
}];
}];
最终在iOS 5.0中使用块完成了它
[UIView animateWithDuration:2. delay:0 options:UIViewAnimationOptionAutoreverse|UIViewAnimationOptionBeginFromCurrentState animations:^{
[self.messageLabel setFrame:CGRectMake(90, 0, labelSize.width, 90)];
} completion:^(BOOL finished) {
}];
[UIView animateWithDuration:1. delay:0 options:UIViewAnimationOptionBeginFromCurrentState animations:^{
[self setFrame:CGRectMake(self.frame.origin.x-labelSize.width-PADDING, self.frame.origin.y, self.frame.size.width+labelSize.width+PADDING, self.frame.size.height)];
[self.messageLabel setFrame:CGRectMake(95, 10, labelSize.width, labelSize.height)];
self.messageLabel.alpha = 1;
} completion:^(BOOL finished) {
[UIView animateWithDuration:1. delay:2. options:0 animations:^{
self.messageLabel.alpha = 0;
} completion:^(BOOL finished) {
[UIView animateWithDuration:1. delay:0. options:0 animations:^{
[self setFrame:CGRectMake(self.frame.origin.x+labelSize.width+PADDING, self.frame.origin.y, self.frame.size.width-labelSize.width-PADDING, self.frame.size.height)];
} completion:^(BOOL finished) {
}];
}];
}];