. 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图2的样子。
2. 自定义了leftBarbuttonItem左滑返回手势失效了怎么办?
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] 复制代码 3. ScrollView莫名其妙不能在viewController划到顶怎么办? **self.automaticallyAdjustsScrollViewInsets = NO; ** 复制代码 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; 5. 为什么我的App老是不流畅,到底哪里出了问题? 如图: 这个神器叫做:KMCGeigerCounter **_myTableView.separatorInset = UIEdgeInsetsMake(0, 100, 0, 0); ** 复制代码 7. 怎么点击self.view就让键盘收起,需要添加一个tapGestures么? 复制代码 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 复制代码 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];** 复制代码 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: { ** ** [self handleRightGesture:sender]; ** ** break; ** ** } ** ** default: { ** ** break; ** ** } ** ** } ** ** break; ** ** } ** ** case UIGestureRecognizerStateEnded: { ** ** direction = UIPanGestureRecognizerDirectionUndefined; ** ** break; ** ** } ** ** default: ** ** break; ** **} ** **} ** 复制代码 15. 拉伸图片的时候怎么才能让图片不变形? 方法一: UIImage *image = [[UIImage imageNamed:@"xxx"] stretchableImageWithLeftCapWidth:10 topCapHeight:10]; 复制代码 注:有开发者提醒这个已经弃用,现在的方法叫resizableImageWithCapInsets。 方法二,如图: 16. 怎么播放GIF的时候这么卡,有没有好点的库? FlipBoard出品的FLAnimatedImage太适合你了。 17. 怎么一句话添加上拉刷新? 使用SVPullToRefresh库: [tableView addPullToRefreshWithActionHandler:^{ // prepend data to dataSource, insert cells at top of table view // call [tableView.pullToRefreshView stopAnimating] when done } position:SVPullToRefreshPositionBottom]; 复制代码 18. 怎么把tableview里Cell的小对勾颜色改成别的颜色? **_mTableView.tintColor = [UIColor redColor]; ** 复制代码 19. 本来我的statusbar是lightcontent的,结果用UIImagePickerController会导致我的statusbar的样式变成黑色,怎么办? **- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated ** **{ ** ** [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent]; ** **} ** 复制代码 20. 怎么把我的navigationbar弄成透明的而不是带模糊的效果? **[self.navigationBar setBackgroundImage:[UIImage new] ** ** forBarMetrics:UIBarMetricsDefault]; ** **self.navigationBar.shadowImage = [UIImage new]; ** **self.navigationBar.translucent = YES; ** 复制代码 21. 怎么改变uitextfield placeholder的颜色和位置? 继承uitextfield,重写这个方法: 复制代码
initWithImage:img
style:UIBarButtonItemStylePlain
target:self
action:@selector(onBack:)];
self.navigationController.interactivePopGestureRecognizer.delegate = (id
使用IQKeyboardManager(GitHub上可搜索),用完之后腰也不疼了,腿也不酸了。
,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?
{
[self.view endEditing:YES];
}
8. 怎么给每个ViewController设定默认的背景图片?
[[UIColor blueColor] setFill];
[self.placeholder drawInRect:rect withFont:self.font lineBreakMode:UILineBreakModeTailTruncation alignment:self.textAlignment];
}