您好,登錄后才能下訂單哦!
雙擊放大是 iPhone 的一個基本操作,第三方程序里引入這一功能的話,主要是在 scrollview 呈現(xiàn)一張圖片或者 PDF 頁面時,雙擊可以放大,主要代碼如下
- (void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(UIView *)view atScale:(float)scale
{
NSLog(@"%s", _cmd);
CGFloat zs = scrollView.zoomScale;
zs = MAX(zs, 0.1);
zs = MIN(zs, 5.0);
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.3];
scrollView.zoomScale = zs;
[UIView commitAnimations];
}
#pragma mark -
#pragma mark === UITouch Delegate ===
#pragma mark -
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
//NSLog(@"%s", _cmd);
UITouch *touch = [touches anyObject];
if ([touch tapCount] == 2)
{
//NSLog(@"double click");
CGFloat zs = self.zoomScale;
zs = (zs == 1.0) ? 2.0 : 1.0;
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.3];
self.zoomScale = zs;
[UIView commitAnimations];
}
}
免責(zé)聲明:本站發(fā)布的內(nèi)容(圖片、視頻和文字)以原創(chuàng)、轉(zhuǎn)載和分享為主,文章觀點(diǎn)不代表本網(wǎng)站立場,如果涉及侵權(quán)請聯(lián)系站長郵箱:is@yisu.com進(jìn)行舉報,并提供相關(guān)證據(jù),一經(jīng)查實,將立刻刪除涉嫌侵權(quán)內(nèi)容。