#!/bin/bash buildNumber=$(/usr/libexec/PlistBuddy -c "Print CFBundleVersion" "$INFOPLIST_FILE") buildNumber=$(($buildNumber + 1)) /usr/libexec/PlistBuddy -c "Set :CFBundleVersion $buildNumber" "$INFOPLIST_FILE"
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=[[UIBarButtonItemalloc]
initWithImage:img
style:UIBarButtonItemStylePlain
target:self
action:@selector(onBack:)];
self.navigationController.interactivePopGestureRecognizer.delegate=(id<UIGestureRecognizerDelegate>)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,到底哪里出了问题?
如图:
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*)toucheswithEvent:(UIEvent*)event
{
[self.viewendEditing: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?
[[UIBarButtonItemappearance]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essay-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
{
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:{
switch(direction){
caseUIPanGestureRecognizerDirectionUp:{
[selfhandleUpwardsGesture:sender];
break;
}
caseUIPanGestureRecognizerDirectionDown:{
[selfhandleDownwardsGesture:sender];
break;
}
caseUIPanGestureRecognizerDirectionLeft:{
[selfhandleLeftGesture:sender];
break;
}
caseUIPanGestureRecognizerDirectionRight:{
[selfhandleRightGesture:sender];
break;
}
default:{
break;
}
}
break;
}
caseUIGestureRecognizerStateEnded:{
direction=UIPanGestureRecognizerDirectionUndefined;
break;
}
default:
break;
}
}
15. 拉伸图片的时候怎么才能让图片不变形?
方法一:
UIImage*image=[[UIImageimageNamed:@"xxx"]stretchableImageWithLeftCapWidth:10topCapHeight:10
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:
[tableViewaddPullToRefreshWithActionHandler:^{
//prependdatatodataSource,insertcellsattopoftableview
//call[tableView.pullToRefreshViewstopAnimating]whendone
}position:SVPullToRefreshPositionBottom];
18. 怎么把tableview里Cell的小对勾颜色改成别的颜色?
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*)navigationControllerwillShowViewController:(UIViewController*)viewControlleranimated:(BOOL)animated
{
[[UIApplicationsharedApplication]setStatusBarStyle:UIStatusBarStyleLightContent];
}
20. 怎么把我的navigationbar弄成透明的而不是带模糊的效果?
[self.navigationBarsetBackgroundImage:[UIImagenew]
forBarMetrics:UIBarMetricsDefault];
self.navigationBar.shadowImage=[UIImagenew];
self.navigationBar.translucent=YES;
21. 怎么改变uitextfield placeholder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];
}
1、更加强大的Log输出
#define DLog(fmt, ...) NSLog((@"%s [Line %d] " fmt), PRETTY_FUNCTION, LINE, ##VA_ARGS);
NSInteger numberA = 100;DLog(@"numberA is %ld",numberA);NSArray *arrayA = @[@"A",@"B",@"C"];DLog(@"arrayA is %@",arrayA);
打印的内容包括所在的类,所在的方法,所在行数。
2、布局时候使用CGRectInset,设置左右、上下边距
UIView *blackView = [[UIView alloc] initWithFrame:CGRectInset(self.view.bounds, 10,30)];blackView.backgroundColor = [UIColor blackColor];[self.view addSubview:blackView];
3、CFAbsoluteTimeGetCurrent()计算时间差
NSTimeInterval startTime = CFAbsoluteTimeGetCurrent();NSURL *url = [NSURLURLWithString:@"http://m.weather.com.cn/atad/101280601.html"];NSData *data = [NSDatadataWithContentsOfURL:url];DLog(@"data is %@",data);NSTimeInterval endTime = CFAbsoluteTimeGetCurrent();DLog(@"time gap is %f",endTime - startTime);
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