原文轉自:http://www.cocoachina.com/ios/20141231/10783.html
TableView不顯示沒內容的Cell怎麼辦?
類似這種,我不想讓下面那些空的顯示.
很簡單.
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self.tableView.tableFooterView = [[UIView alloc] init]; |
試過的都說好.
加完這句之後就變成了這樣.
自定義了leftBarbuttonItem左滑返回手勢失效了怎麼辦?
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self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithImage:img style:UIBarButtonItemStylePlain target:self action:@selector(onBack:)]; self.navigationController.interactivePopGestureRecognizer.delegate = (id)self; |
ScrollView莫名其妙不能在viewController劃到頂怎麼辦?
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self.automaticallyAdjustsScrollViewInsets = NO; |
鍵盤事件寫的好煩躁,都想摔鍵盤了,怎麼辦?
1.買個結實的鍵盤.
2.使用IQKeyboardManager(github上可搜索),用完之後腰也不疼了,腿也不酸了.
爲什麼我的app老是不流暢,到底哪裏出了問題?
如圖
這個神器叫做:KMCGeigerCounter,快去github搬運吧.
怎麼在不新建一個Cell的情況下調整separaLine的位置?
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_myTableView.separatorInset = UIEdgeInsetsMake(0, 100, 0, 0); |
怎麼點擊self.view就讓鍵盤收起,需要添加一個tapGestures麼?
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- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { [self.view endEditing:YES]; } |
怎麼給每個ViewController設定默認的背景圖片?
使用基類啊,少年。
想在代碼裏改在xib裏添加的layoutAttributes,但是怎麼用代碼找啊?
像拉button一樣的拉你的約束.nslayoutattribute也是可以拉線的.
怎麼像safari一樣滑動的時候隱藏navigationbar?
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navigationController.hidesBarsOnSwipe = Yes |
導航條返回鍵帶的title太討厭了,怎麼讓它消失!
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[[UIBarButtonItem appearance] setBackButtonTitlePositionAdjustment:UIOffsetMake(0, -60) forBarMetrics:UIBarMetricsDefault]; |
CoreData用起來好煩,語法又臭又長,怎麼辦?
MagicRecord
CollectionView 怎麼實現tableview那種懸停的header?
CSStickyHeaderFlowLayou
能不能只用一個pan手勢來代替UISwipegesture的各個方向?
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- (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: { [self handleRightGesture:sender]; break ; } default : { break ; } } break ; } case UIGestureRecognizerStateEnded: { direction = UIPanGestureRecognizerDirectionUndefined; break ; } default : break ; } } |
拉伸圖片的時候怎麼才能讓圖片不變形?
1.UIImage *image = [[UIImage imageNamed:@"xxx"] stretchableImageWithLeftCapWidth:10 topCapHeight:10];
2.
怎麼播放GIF的時候這麼卡,有沒有好點的庫?
FlipBoard出品的太適合你了:https://github.com/Flipboard/FLAnimatedImage
怎麼一句話添加上拉刷新?
https://github.com/samvermette/SVPullToRefresh
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[tableView addPullToRefreshWithActionHandler:^{ // prepend data to dataSource, insert cells at top of table view // call [tableView.pullToRefreshView stopAnimating] when done } position:SVPullToRefreshPositionBottom]; |
怎麼把tableview裏cell的小對勾的顏色改成別的顏色?
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_mTableView.tintColor = [UIColor redColor]; |
本來我的statusbar是lightcontent的,結果用UIImagePickerController會導致我的statusbar的樣式變成黑色,怎麼辦?
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- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated { [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent]; } |
怎麼把我的navigationbar弄成透明的而不是帶模糊的效果?
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[self.navigationBar setBackgroundImage:[UIImage new ] forBarMetrics:UIBarMetricsDefault]; self.navigationBar.shadowImage = [UIImage new ]; self.navigationBar.translucent = YES; |
怎麼改變uitextfield placeholder的顏色和位置?
繼承uitextfield,重寫這個方法
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- (void) drawPlaceholderInRect:(CGRect)rect { [[UIColor blueColor] setFill]; [self.placeholder drawInRect:rect withFont:self.font lineBreakMode:UILineBreakModeTailTruncation alignment:self.textAlignment]; } |
你爲什麼知道這麼多奇怪的花招?
去stackoverflow刷問題啊,少年!