结合自身的实践开发经验总结出了22个iOS开发的小技巧，以非常欢乐的语调轻松解决开发过程中所遇到的各种苦逼难题，光读着便已忍俊不禁。
1. TableView不显示没内容的Cell怎么办？ 类似于图1，我不想让下面的那些空显示。很简单，添加“self.tableView.tableFooterView = [[UIView alloc] init];”试过都说好，加完这句之后就变成了
2. 自定义了leftBarbuttonItem左滑返回手势失效了怎么办？ self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithImage:img style:UIBarButtonItemStylePlain target:self action:@selector(onBack:)]; self.navigationController.interactivePopGestureRecognizer.delegate = (id)self;
3. ScrollView莫名其妙不能在viewController划到顶怎么办？ self.automaticallyAdjustsScrollViewInsets = NO;
4. 键盘事件写得好烦躁，都想摔键盘了怎么办？ 买个结实的键盘； 使用IQKeyboardManager（GitHub上可搜索），用完之后腰也不疼了，腿也不酸了。
5. 为什么我的App老是不流畅， 这个神器叫做：KMCGeigerCounter ，快去GitHub上搬运吧。
6. 怎么在不新建一个Cell的情况下调整separaLine的位置？ _myTableView.separatorInset = UIEdgeInsetsMake(0, 100, 0, 0);
7. 怎么点击self.view就让键盘收起，需要添加一个tapGestures么？ - (void)touchesBegan:(NSSet )touches withEvent:(UIEvent )event { [self.view endEditing:YES]; }
8. 怎么给每个ViewController设定默认的背景图片？ 使用基类啊，少年。
9. 想在代码里改在xib里添加的layoutAttributes，但该怎么用代码找？ 像拉Button一样地拉你的约束，nslayoutattribute也是可以拉线的。 10. 怎么像Safari一样滑动的时候隐藏navigationbar？ navigationController.hidesBarsOnSwipe = Yes
11. 导航条返回键带的title太讨厌了，怎么让它消失？ [[UIBarButtonItem appearance] setBackButtonTitlePositionAdjustment:UIOffsetMake(0, -60) forBarMetrics:UIBarMetricsDefault];
12. CoreData用起来好烦，语法又臭又长怎么办？ MagicRecord
13. CollectionView怎么实现tableview那种悬停的header？ CSStickyHeaderFlowLayout
14. 能不能只用一个pan手势来代替UISwipegesture的各个方向？
- (void)pan:(UIPanGestureRecognizer *)sender { typedef NS_ENUM(NSUInteger, UIPanGestureRecognizerDirection) { UIPanGestureRecognizerDirectionUndefined, UIPanGestureRecognizerDirectionUp, UIPanGestureRecognizerDirectionDown, UIPanGestureRecognizerDirectionLeft, UIPanGestureRecognizerDirectionRight }; static UIPanGestureRecognizerDirection direction = UIPanGestureRecognizerDirectionUndefined; switch (sender.state) { case UIGestureRecognizerStateBegan: { if (direction == UIPanGestureRecognizerDirectionUndefined) { CGPoint velocity = [sender velocityInView:recognizer.view]; BOOL isVerticalGesture = 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; } case UIGestureRecognizerStateChanged: { switch (direction) { case UIPanGestureRecognizerDirectionUp: { [self handleUpwardsGesture:sender]; break; } case UIPanGestureRecognizerDirectionDown: { [self handleDownwardsGesture:sender]; break; } case UIPanGestureRecognizerDirectionLeft: { [self handleLeftGesture:sender]; break; } case UIPanGestureRecognizerDirectionRight: {}
