iOS开发杂记

作者: Mr_Zander | 来源:发表于2017-03-28 12:17 被阅读39次

    下面的内容基本都是我亲测的

    • Xcode目录位置:~/Library/Developer/Xcode/
    • Code Snippets目录:~/Library/Developer/Xcode/UserData/CodeSnippets
    • 插件安装位置:~/Library/Application Support/Developer/Shared/Xcode/Plug-ins
    • profile:~/Library/MobileDevice/Provisioning Profiles
    • 在 iOS 7 中,如果某个 UIViewController 的 self.view 第一个子视图是 UIScollView, 同时当这个 UIViewController 被 push 或 initWithRootController 成为 UINavigationController控制的Controller时,这个 UIViewController的 view 的子视图 UIScollView 的所有子视图, 都会被下移 64px。http://unremittingly.iteye.com/blog/2031626
    • ios中json解析出现的null问题
    • 下载sinippet editor:http://cocoaholic.com/snippet_edit/
    • Xcode通配符:
      • Bundle name: $(PRODUCT_NAME)
      • Bundle identifier: $(PRODUCT_BUNDLE_IDENTIFIER)
    • Git同步远程被删除的分支:git remote prune origin
    • debugLog宏定义:
    #ifdef DEBUG
        #define DebugLog(format, ...) NSLog((@"%s [Line %d] " format), __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__)
    #else
        #define DebugLog(...)
    #endif
    
    • UITextView光标下移的问题:
    UIViewController.automaticallyAdjustsScrollViewInsets = NO;
    
    • UINavigationBar设置返回按钮图片
    self.navigationController.navigationBar.backIndicatorImage = self.navigationController.navigationBar.backIndicatorTransitionMaskImage = [[UIImage imageNamed:@"navi_back"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
    
    • 设置naviagationBar的title字体
    [self.navigationController.navigationBar setTitleTextAttributes:@{NSForegroundColorAttributeName: [UIColor colorWithHexString:@"#333333"], NSFontAttributeName: [UIFont systemFontOfSize:16.5]}];
    
    • separator 顶头
    -(void)viewDidLayoutSubviews
    {
        if ([self.tableView respondsToSelector:@selector(setSeparatorInset:)])
        {
            [self.tableView setSeparatorInset:UIEdgeInsetsZero];
            
        }
        if ([self.tableView respondsToSelector:@selector(setLayoutMargins:)])
        {
            [self.tableView setLayoutMargins:UIEdgeInsetsZero];
        }
    }
    
    • 自定义UITabBar高度:
      // 在UITabBarController的子类中调用
      - (void)viewWillLayoutSubviews
      {
        CGRect tabFrame = self.tabBar.frame; //self.TabBar is IBOutlet of your TabBar
        tabFrame.size.height = kTabbarH;
        tabFrame.origin.y = self.view.frame.size.height - kTabbarH;
        self.tabBar.frame = tabFrame;
      }
    
    • 改变UITabBar的文字颜色
      - (void)setTitleTextAttributes:(nullable NSDictionary<NSString *,id> *)attributes   forState:(UIControlState)state NS_AVAILABLE_IOS(5_0)   UI_APPEARANCE_SELECTOR;
    
    • 给UITabBarItem添加背景色
    [[UITabBar appearance] setSelectionIndicatorImage:[UIImage imageWithColor:UIColorFromHex(FFDC02) size:CGSizeMake(kScreenWidth / self.viewControllers.count, kTabbarH)]];
    
    • 改变UITabBarItem中文字的位置
    [UITabBarItem appearance].titlePositionAdjustment = UIOffsetMake(0, -3);
    
    • UITableView separatorInset
      -(void)viewDidLayoutSubviews
      {
          if ([self.tableView respondsToSelector:@selector(setSeparatorInset:)])
          {
              [self.tableView setSeparatorInset:UIEdgeInsetsZero];   
          }
          if ([self.tableView respondsToSelector:@selector(setLayoutMargins:)])
          {
              [self.tableView setLayoutMargins:UIEdgeInsetsZero];
          }
      }
      - (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell       forRowAtIndexPath:(NSIndexPath *)indexPath
      {
          if ([cell respondsToSelector:@selector(setSeparatorInset:)])
          {
              [cell setSeparatorInset:UIEdgeInsetsZero];
          }
          if ([cell respondsToSelector:@selector(setLayoutMargins:)])
          {
              [cell setLayoutMargins:UIEdgeInsetsZero];
          }
      }
    
    • 自定义SearchBar的CancelButton
    NSArray *searchBarSubViews = [[sc.searchBar.subviews objectAtIndex:0] subviews];
        for (UIView *searchbuttons in searchBarSubViews)
        {
            if ([searchbuttons isKindOfClass:[UIButton class]])
            {
                UIButton *cancelButton = (UIButton *) searchbuttons;
                cancelButton.enabled = YES;
                cancelButton.hidden = YES;
                [cancelButton setTitle:@"取消" forState:UIControlStateNormal]; //文字
                [cancelButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
                [cancelButton setTitleColor:[UIColor whiteColor] forState:UIControlStateHighlighted];
                break;
            }
        }
    
    • 改变barItem图片的位置
    UIBarItem.imageInsets
    
    • CAAnimation结束后保持最后位置
    animation.removedOnCompletion = NO;
    animation.fillMode = kCAFillModeForwards;
    
    • 复制一个view
      - (MyView *)duplicate
      {
        NSData * tempArchive = [NSKeyedArchiver archivedDataWithRootObject:self];
        return [NSKeyedUnarchiver unarchiveObjectWithData:tempArchive];
      }
    
    • 把view生成一个image
      - (UIImage *)imageWithView:(UIView *)view
      {
          UIGraphicsBeginImageContextWithOptions(view.bounds.size, NO, [UIScreen   mainScreen].scale);
          [view.layer renderInContext:UIGraphicsGetCurrentContext()];
          UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
          UIGraphicsEndImageContext();
          return image;
    }
    其中[UIScreen mainScreen].scale参数可以使生成的图片更清晰。
    
    • UIToolBar clearColor
      [toolBar setBackgroundImage:[UIImage alloc] forToolbarPosition:UIBarPositionAny   barMetrics:UIBarMetricsDefault];
      [toolBar setShadowImage:[UIImage alloc] forToolbarPosition:UIBarPositionAny];
    
    • 约束的符号断点 UIViewAlertForUnsatisfiableConstraints

    • Cocoa Touch template can be found from:
      /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/Xcode/Templates/File Templates/Source.

    • 定制工程模板和类模板:http://www.jianshu.com/p/738d5697e869

    • NSURL的一些概念:

      NSURL *myUrl = [NSURL URLWithString:@"search?q=uiviewcontroller"
                              relativeToURL:[NSURL URLWithString:@"https://www.baidu.com/"]];
        
      NSLog(@"baseURL = %@", myUrl.baseURL);  //  https://www.baidu.com/
      NSLog(@"path = %@", myUrl.path);        //  /search
      NSLog(@"scheme = %@", myUrl.scheme);    //  https
      NSLog(@"resourceSpecifier = %@", myUrl.resourceSpecifier);  //  search?  q=uiviewcontroller
      NSLog(@"relativePath = %@", myUrl.relativePath);    //  search
      NSLog(@"relativeString = %@", myUrl.relativeString);    //  search?  q=uiviewcontroller
    NSLog(@"absoluteURL = %@", myUrl.absoluteURL);  //    https://www.baidu.com/search?q=uiviewcontroller
      NSLog(@"absoluteString = %@", myUrl.absoluteString);    //      https://www.baidu.com/search?q=uiviewcontroller
    
    • 分类添加属性:http://www.jianshu.com/p/3cbab68fb856
    • 解决duplicate symbol OBJC_IVAR$ in:的方法:1. 查看项目结构里是不是有多个重复的文件 2.Build Phases -> Compile Sources里面是不是链接了多个.m
    • 创建单例的写法:
      /**
       *  初始化方法
       */
      + (instancetype)sharedManager
      {
          static dispatch_once_t onceToken;
          dispatch_once(&onceToken, ^{
              _sharedManger = [[super allocWithZone:NULL] init];
          });
          return _sharedManger;
      }
      - (id)copyWithZone:(NSZone *)zone
      {
          return [YZJIMManager sharedManager];
      }
    
      + (id)allocWithZone:(struct _NSZone *)zone
      {
          return [YZJIMManager sharedManager];
      }
    
    • 解决navigationBar下面的子视图不能从navationBar开始计算frame的问题:
        self.edgesForExtendedLayout = UIRectEdgeNone;
    
    • iPhone 尺寸
    机型 像素
    6 p / 6s p 1242 * 2208 414 * 736
    6 / 6s 750 * 1334 375 * 667
    5 / 5c / 5s 640 * 1136 320 * 568
    4 / 4s 640 * 960 320 * 480
    • 动态库提交app store
      为了能够顺利提交app至app store, 需要移除动态库中的x86_64和i386平台,具体操作如下:
    1. 进入libksygpulivedylib.framework目录,执行命令:
    2. lipo libksygpulivedylib -remove x86_64 -output libksygpulivedylib
    3. lipo libksygpulivedylib -remove i386 -output libksygpulivedylib
    4. 执行完成后可使用lipo -info libksygpulivedylib 命令确认当前的动态库已经移除上面两个平台。
    5. 如果不执行上述操作,那么在提交app store的时候,可能会出现ITMS-90087, ITMS-90209, ITMS-90125错误。
    • 上架需要的资源
    screen shot : 上架尺寸
    iPhone4 : 640x960 或者 960x640
    iPhone5 640 x 1136或者1136 x 640
    iPhone6 750 x 1334 或者1334 x 750
    iPhone6 plus 1242 x 2208 或者 2208x1242 (phone 6 plus实际分辨率是 1080x1920)
    
    ipad不管是哪代 都是 768 x 1024 或者 1024 x 768
    
    视频尺寸
    3.5寸 无视频 无需上传
    ipad 900x1200 或者 1200 x 900
    4.7寸 750x1334 或者 1334 x 750
    5.5寸和4寸都可以用 1080x1920 或者 1920 x 1080
    App图标:需要1024*1024(像素)的图片
    
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