我只想在Swift中获取单个字符串的ASCII值.这就是我目前正在做的事情:
var singleChar = "a"
println(singleChar.unicodeScalars[singleChar.unicodeScalars.startIndex].value) //prints: 97
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这太难看了.必须有一个更简单的方法.
我最初尝试这样做,两个UICollectionViews堆叠在一起.然而,将其扩展到正确是噩梦Auto-layout(我是一个新手iOS开发人员,所以这更像是对我的技能的批评而不是Auto-layout).我想将两部分UICollectionView单元格堆叠在一起,如下所示:
+----------------------+
|+-Section 0---------->|
| +-------+ +-------+ |
| | | | | |
| | | | | |
| |Cell 0 | |Cell 1 |+->
| | | | | |
| | | | | |
| +-------+ +-------+ |
+--Section 1---------->|
| +-------+ +-------+ |
| | | | | |
| | | | | |
| | | | | |
| |Cell 0 | |Cell …Run Code Online (Sandbox Code Playgroud) cocoa-touch ios uicollectionview uicollectionviewlayout ios7
我已经尝试过关于其他几个线程的建议,但他们的方法在这种情况下似乎不起作用.这是我的情况:
我有2个滚动视图."滚动视图A"具有在滚动"滚动视图A"时淡入和淡出的标签.拖动"滚动视图B"时,我想立即隐藏"滚动视图A"上的标签.但是我不能打断标签的慢速淡出动画.以下是我使用的两种方法:
- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
{
if (scrollView.tag != 1)
{
[UIView animateWithDuration:1 delay:0 options:UIViewAnimationOptionCurveEaseIn | UIViewAnimationOptionBeginFromCurrentState animations:^{
self.liveOverlayLabel.alpha = .6;
} completion:^(BOOL finished) {
}];
}
else
{
[UIView animateWithDuration:0 delay:0 options:UIViewAnimationOptionCurveEaseIn | UIViewAnimationOptionBeginFromCurrentState animations:^{
self.liveOverlayLabel.alpha = 0;
} completion:^(BOOL finished) {
self.liveOverlayLabel.alpha = 0;
}];
}
}
-(void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate
{
if (scrollView.tag != 1)
{
NSLog(@"stoppping");
[UIView animateWithDuration:5 delay:0 options:UIViewAnimationOptionCurveEaseIn animations:^{
self.liveOverlayLabel.alpha = 0;
} completion:^(BOOL finished) {
}];
}
else
{
self.liveOverlayLabel.alpha = 0;
}
}
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ascii ×1
character ×1
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string ×1
swift ×1
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