开发的一些KitKat技巧iOS开发的一些奇巧淫技2能不能只用一个pan手势来代替UISwipegesture的各个方向?-(void)pan:(UIPanGestureRecognizer*)sender{typedefNS_ENUM(NSUInteger,UIPanGestureRecognizerDirection){UIPanGestureRecognizerDirectionUndefined,UIPanGestureRecognizerDirectionUp,UIPanGestureRecognizerDirectionDown,UIPanGestureRecognizerDirectionLeft,UIPanGestureRecognizerDirectionRight};staticUIPanGestureRecognizerDirectiondirection=UIPanGestureRecognizerDirectionUndefined;switch(sender.state){caseUIGestureRecognizerStateBegan:{if(direction==UIPanGestureRecognizerDirectionUndefined){CGPointvelocity=[sendervelocityInView:recognizer.view];BOOLisVerticalGesture=fabs(velocity.y)>fabs(velocity.x);if(isVerticalGesture){if(velocity.y>0){direction=UIPanGestureRecognizerDirectionDown;}else{direction=UIPanGestureRecognizerDirectionUp;}}else{if(velocity.x>0){direction=UIPanGestureRecognizerDirectionRight;}else{direction=UIPanGestureRecognizerDirectionLeft;}}}break;}caseUIGestureRecognizerStateChanged:{开关（方向）{caseUIPanGestureRecognizerDirectionUp:{[selfhandleUpwardsGesture:sender];break;}caseUIPanGestureRecognizerDirectionDown:{[selfhandleDownwardsGesture:sender];break;}caseUIPanGestureRecognizerDirectionLeft:{[selfhandleLeftGesture:sender];break;}caseUIPanGestureRecognizerDirectionRight]:{[selfhandleRecognizerDirectionRight]break;}default:{break;}}break;}caseUIGestureRecognizerStateEnded:{direction=UIPanGestureRecognizerDirectionUndefined;break;}default:break;}}图片怎么拉伸不变形呢？UIImage*image=[[UIImageimageNamed:@"xxx"]stretchableImageWithLeftCapWidth:10topCapHeight:10];（刚才有人提醒说这个已经被弃用了，现在的方法叫resizableImageWithCapInsets）。为什么播放GIF时卡得这么厉害？点库？FlipBoard正适合您。https://github.com/Flipboard/FLAnimatedImage如何在一句话中添加上拉刷新？https://github.com/samvermette/SVPullToRefresh[tableViewaddPullToRefreshWithActionHandler:^{//prependdatatodataSource,insertcellsattopoftableview//call[tableView.pullToRefreshViewstopAnimating]whendone}position:SVPullToRefreshPositionBottom];如何将表格视图中单元格的小复选标记的颜色更改为另一种颜色？_mTableView.tintColor=[UIColorredColor];本来我的状态栏是lightcontent，但是使用UIImagePickerController会导致我的状态栏的样式变成黑色，怎么办？-(void)navigationController:(UINavigationController*)navigationControllerwillShowViewController:(UIViewController*)viewControlleranimated:(BOOL)animated{[[UIApplicationsharedApplication]setStatusBarStyle:UIStatusBarStyleLightContent];}如何使我的导航栏透明而不是模糊？[self.navigationBarsetBackgroundImage:[UIImagenew]forBarMetrics:UIBarMetricsDefault];self.navigationBar.shadowImage=[UIImagenew];self.navigationBar.translucent=YES;如何更改uitextfield占位符的颜色和位置？继承uitextfield，重写这个方法-(void)drawPlaceholderInRect:(CGRect)rect{[[UIColorblueColor]setFill];[self.placeholderdrawInRect:rectwithFont:self.fontlineBreakMode:UILineBreakModeTailTruncationalignment:self.textAlignment];}怎么就知道这么多奇怪的事情诡计？去stackoverflow问问题，小子！
