iOS--喜闻乐见⑤

• 更改状态栏的背景颜色

UIView *statusBar = [[[UIApplication sharedApplication] valueForKey:@"statusBarWindow"] valueForKey:@"statusBar"];    
if ([statusBar respondsToSelector:@selector(setBackgroundColor:)]) {     
statusBar.backgroundColor = [UIColor redColor];
}

• 设置alertView内容对齐方式NSTextAlignment

NSString *titleString = @"发现新版本 v1.1";
NSString *messageString = @"1.哈哈\n2.嘿嘿\n3.呵呵";
UIAlertController * alertView = [UIAlertController alertControllerWithTitle:titleString message:messageString preferredStyle:UIAlertControllerStyleAlert];
//需要遍历6层subViews（没写for循环，可自行修改）
UIView *subView1 = alertView.view.subviews[0];
UIView *subView2 = subView1.subviews[0];
UIView *subView3 = subView2.subviews[0];
UIView *subView4 = subView3.subviews[0];
UIView *subView5 = subView4.subviews[0];
UILabel *title        = subView5.subviews[0];
UILabel *message = subView5.subviews[1];
title.textAlignment = NSTextAlignmentLeft;
message.textAlignment = NSTextAlignmentLeft;

 UIAlertAction * cancelAction = [UIAlertAction actionWithTitle:@"稍候再说" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
    }];
UIAlertAction * maskAction = [UIAlertAction actionWithTitle:@"立即更新" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
}];
 [alertView addAction:cancelAction];
 [alertView addAction:maskAction];
 [self presentViewController:alertView animated:YES completion:nil];

• URL编码解码
  //URLDEcode
  - (NSString)encodeString:(NSString)unencodedString{
  NSString *encodedString = (NSString )
  CFBridgingRelease(CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault,
  (CFStringRef)unencodedString,
  NULL,
  (CFStringRef)@"!'();:@&=+$,/?%#[]",
  kCFStringEncodingUTF8));
  return encodedString;
  }
  //URLDEcode
  -(NSString )decodeString:(NSString)encodedString{
  NSString *decodedString = (__bridge_transfer NSString *)CFURLCreateStringByReplacingPercentEscapesUsingEncoding(NULL,
  (__bridge CFStringRef)encodedString,
  CFSTR(""),
  CFStringConvertNSStringEncodingToEncoding(NSUTF8StringEncoding));
  return decodedString;
  }

• 使用Xcode查找项目中的中文字符串

 1. 打开”Find Navigator”
 2. 切换搜索模式到 “Find > Regular Expression”
 3. 输入@"[^"]*[\u4E00-\u9FA5]+[^"\n]*?" (swift请去掉”@” 输入@"[^"]*[\u4E00-\u9FA5]+[^"\n]*?" 就好了)

• 去除Xcode多余的模拟器

1.关闭xcode
2.终端输入 sudo killall -9 com.apple.CoreSimulator.CoreSimulatorService 输入你的电脑密码
3.终端输入 rm -rf ~/Library/Developer/CoreSimulator/Devices

• git push文件太大 HTTP Error: 413 Request Entity Too Large

用http链接传的代码，文件太大，需配置文件上传最大限制或者用ssh上传，这里说的是ssh上传
1.先检查下有没有安装ssh，一般都安装了，没安装的自己百度
 *  打开终端：$ ssh -v
  出现OpenSSH_6.2p2, OSSLShim 0.9.8r 8 Dec 2011
usage: ssh [-1246AaCfgKkMNnqsTtVvXxYy] [-b bind_address] [-c cipher_spec]
           [-D [bind_address:]port] [-e escape_char] [-F configfile]
           [-I pkcs11] [-i identity_file]
           [-L [bind_address:]port:host:hostport]
           [-l login_name] [-m mac_spec] [-O ctl_cmd] [-o option] [-p port]
           [-R [bind_address:]port:host:hostport] [-S ctl_path]
           [-W host:port] [-w local_tun[:remote_tun]]
           [user@]hostname [command]
显示这个表示已安装
2.获取ssh key
$ open  ~/.ssh
打开id_rsa.pub，里面的内容就是ssh key了，全复制到git的ssh key配置项，添加
之后，采用ssh链接上传代码就OK了(登录你的github账号，从又上角的设置进入，然后点击菜单栏的 SSH key 进入页面添加 SSH key。)

• 目录路径

//获取程序Documents目录路径
NSArray * paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
NSString * documentsDirectory = [paths objectAtIndex:0];
//获取程序app文件所在目录路径
NSHomeDirectory();
//获取程序tmp目录路径
NSTemporaryDirectory();
//获取程序应用包路径
[[NSBundle mainBundle] resourcePath];
或
[[NSBundle mainBundle] pathForResource:@"info"ofType:@"txt"];

• PUSH和POP动画

  1. push默认动画效果
   CATransition *transition = [CATransition animation];
    transition.duration = 0.25f;
    transition.timingFunction = [CAMediaTimingFunction  functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
    transition.type = kCATransitionPush;
    transition.subtype = kCATransitionFromRight;
    transition.delegate = self;
    [self.contentView.layer addAnimation:transition forKey:nil];
    [self.contentView addSubview:self.productDetailController.view];
  
PS：self.contentView是工程中的UIView，self.productDetailController是工程中的controller
 只需要把两者替换成合适的内容即可用
  
2. pop默认动画效果
   CATransition *transition = [CATransition animation];
    transition.duration = 0.25f;
    transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
    transition.type = kCATransitionPush;
    transition.subtype = kCATransitionFromLeft;
    transition.delegate = self;
    [self.view.superview.layer addAnimation:transition forKey:nil];
    [self.view removeFromSuperview];

• 切换根控制器

1. 第一种
[UIView transitionWithView:[[UIApplication sharedApplication].delegate window]
                  duration:0.4
                   options:UIViewAnimationOptionTransitionCrossDissolve
                animations:^{
                    BOOL oldState = [UIView areAnimationsEnabled];
                    [UIView setAnimationsEnabled:NO];
                    [[[UIApplication sharedApplication].delegate window] setRootViewController:vc];
                    [UIView setAnimationsEnabled:oldState];
                }
                completion:NULL];

2. 第二种
for (UIView * subView in appDelegate.window.subviews)
{
      [subView removeFromSuperview];
}
               
 appDelegate.window.rootViewController = [[RootViewController alloc] initialize];

3. 第三种

- (void)setRootViewController:(UIViewController *)rootViewController
{
    //remove old rootViewController's sub views
    for (UIView* subView in self.rootViewController.view.subviews)
    {
        [subView removeFromSuperview];
    }

    //remove old rootViewController's view
    [self.rootViewController.view removeFromSuperview];

    //set new rootViewController
    [super setRootViewController:rootViewController];

    //remove empty UILayoutContainerView(s) remaining on root window
    for (UIView *subView in self.subviews)
    {
        if (subView.subviews.count == 0)
        {
            [subView removeFromSuperview];
        }
    }
}

• 检测UIPickView是否在滑动

  - (BOOL)isPickViewScrolling:(UIView *)view
  {
     if ([view isKindOfClass:[UIScrollView class]])
     {
           UIScrollView *scrollView = (UIScrollView *)view;
          if (scrollView.dragging || scrollView.decelerating)
         {
             return YES;
         }
     }
     for (UIView *theSubView in view.subviews) 
    {
        if ([self isPickViewScrolling:theSubView])
        {
             return YES;
        }
    }
      return NO;
   }
  

• webView隐藏上下滚动出边界时的黑色的图片

    for (UIView *_aView in [_webView subviews])
    {
        if ([_aView isKindOfClass:[UIScrollView class]])
        {
            [(UIScrollView *)_aView setShowsVerticalScrollIndicator:NO];
            //右侧的滚动条
            
            [(UIScrollView *)_aView setShowsHorizontalScrollIndicator:NO];
            //下侧的滚动条
            
            for (UIView *_inScrollview in _aView.subviews)
            {
                if ([_inScrollview isKindOfClass:[UIImageView class]])
                {
                    _inScrollview.hidden = YES;  //上下滚动出边界时的黑色的图片
                }
            }
        }
    }