本文转载至 http://www.cocoachina.com/ios/20141231/10783.html
TableView不显示没内容的Cell怎么办?
类似这种,我不想让下面那些空的显示.
很简单.
1
|
self.tableView.tableFooterView = [[UIView alloc] init]; |
试过的都说好.
加完这句之后就变成了这样.
自定义了leftBarbuttonItem左滑返回手势失效了怎么办?
1
2
3
4
5
6
|
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划到顶怎么办?
1
|
self.automaticallyAdjustsScrollViewInsets = NO; |
键盘事件写的好烦躁,都想摔键盘了,怎么办?
1.买个结实的键盘.
2.使用IQKeyboardManager(github上可搜索),用完之后腰也不疼了,腿也不酸了.
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,快去github搬运吧.
怎么在不新建一个Cell的情况下调整separaLine的位置?
1
|
_myTableView.separatorInset = UIEdgeInsetsMake(0, 100, 0, 0); |
怎么点击self.view就让键盘收起,需要添加一个tapGestures么?
1
2
3
4
|
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { [self.view endEditing:YES]; } |
怎么给每个ViewController设定默认的背景图片?
使用基类啊,少年。
想在代码里改在xib里添加的layoutAttributes,但是怎么用代码找啊?
像拉button一样的拉你的约束.nslayoutattribute也是可以拉线的.
怎么像safari一样滑动的时候隐藏navigationbar?
1
|
navigationController.hidesBarsOnSwipe = Yes |
导航条返回键带的title太讨厌了,怎么让它消失!
1
2
|
[[UIBarButtonItem appearance] setBackButtonTitlePositionAdjustment:UIOffsetMake(0, -60) forBarMetrics:UIBarMetricsDefault]; |
CoreData用起来好烦,语法又臭又长,怎么办?
MagicRecord
CollectionView 怎么实现tableview那种悬停的header?
CSStickyHeaderFlowLayou
能不能只用一个pan手势来代替UISwipegesture的各个方向?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
- (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 ; } } |
拉伸图片的时候怎么才能让图片不变形?
1.UIImage *image = [[UIImage imageNamed:@"xxx"] stretchableImageWithLeftCapWidth:10 topCapHeight:10];
2.
怎么播放GIF的时候这么卡,有没有好点的库?
FlipBoard出品的太适合你了:https://github.com/Flipboard/FLAnimatedImage
怎么一句话添加上拉刷新?
https://github.com/samvermette/SVPullToRefresh
1
2
3
4
|
[tableView addPullToRefreshWithActionHandler:^{ // prepend data to dataSource, insert cells at top of table view // call [tableView.pullToRefreshView stopAnimating] when done } position:SVPullToRefreshPositionBottom]; |
怎么把tableview里cell的小对勾的颜色改成别的颜色?
1
|
_mTableView.tintColor = [UIColor redColor]; |
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?
1
2
3
4
|
- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated { [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent]; } |
怎么把我的navigationbar弄成透明的而不是带模糊的效果?
1
2
3
4
|
[self.navigationBar setBackgroundImage:[UIImage new ] forBarMetrics:UIBarMetricsDefault]; self.navigationBar.shadowImage = [UIImage new ]; self.navigationBar.translucent = YES; |
怎么改变uitextfield placeholder的颜色和位置?
继承uitextfield,重写这个方法
1
2
3
4
|
- (void) drawPlaceholderInRect:(CGRect)rect { [[UIColor blueColor] setFill]; [self.placeholder drawInRect:rect withFont:self.font lineBreakMode:UILineBreakModeTailTruncation alignment:self.textAlignment]; } |
你为什么知道这么多奇怪的花招?
去stackoverflow刷问题啊,少年!