iOS 开发常用笔记

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显示[隐藏文件] defaults write com.apple.finder AppleShowAllFiles -bool true 
关闭显示[隐藏文件] defaults write com.apple.finder AppleShowAllFiles -bool false
删除.svn文件 sudo find /Users/justfly/Documents/workspace/justSVN/ -name ".svn" -exec rm -r {} \;

2.Xcode SVN 报错 The server certificate failed to verify.
xcode 的升级或者切换xcode版本的时候会出现这种错误

解决办法：1、打开终端（实用工具 -->终端），在终端中输入如下命令：
svn ls https://xxxxxxxx/svn/xxxxxx
SVN的路径然后直接输入 “ p ”  确认，就可以重新连接了。

截图

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1.访问appdelegate中tabbar，有时访问不到，尝试以下方法:

1. DXTabBarViewController *tabbarVC = SharedApp.tabVCCenter;
[[UIApplication sharedApplication].keyWindow insertSubview:showView aboveSubview:tabbarVC.tabBar];
2. ((UITabBarController *)SharedApp.tabVCCenter).selectedIndex = 1;
3. SharedApp.tabVCCenter.selectedIndex = 2;

2.点击子视图响应父视图问题

-(UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event
{
    UIView *hitView = [super hitTest:point withEvent:event];
    if (hitView == timeBtn || hitView == addressBtn) {
        //  如果当前btn 不需要相应事件  则向下传递
        return self;
    } else {
        return hitView;
    }
}

3.系统最小值的宏

-(CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section
{
    return CGFLOAT_MIN;
}

4.到AppStore评价

1. 7.0以前的系统
NSString *appStore = [NSString stringWithFormat:@"itms-apps://ax.itunes.apple.com/WebObjects/MZStore.woa/wa/viewContentsUserReviews?type=Purple+Software&id=xxxxxx" ];
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:appStore]];

2. 7.0以后的系统
NSString *appStore = [NSString stringWithFormat:@"itms-apps://itunes.apple.com/app/idxxxxxxx"];
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:appStore]];

3.内置AppStore进行评分
导入StoreKit.framework,添加头文件 #import , 实现代理：< SKStorePRoductViewControllerDelegate >
- (void)loadAppStoreController
{
    UIActivityIndicatorView *indicator = [[UIActivityIndicatorView alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
    indicator.center = [UIApplication sharedApplication].keyWindow.center;
    [indicator setActivityIndicatorViewStyle:UIActivityIndicatorViewStyleGray];
//    indicator.color = [UIColor randomColor];
    [indicator setBackgroundColor:[UIColor lightGrayColor]];
    indicator.hidesWhenStopped = YES;
    [self.view addSubview:indicator];
    [indicator startAnimating];
    // 初始化控制器
    SKStoreProductViewController *storeProductViewContorller = [[SKStoreProductViewController alloc] init];
    // 设置代理请求为当前控制器本身
    storeProductViewContorller.delegate = self;
    [storeProductViewContorller loadProductWithParameters:@{SKStoreProductParameterITunesItemIdentifier:kCPSAppId}  completionBlock:^(BOOL result, NSError *error)   {
        [indicator stopAnimating];
        if(error) {
            NSLog(@"error %@ with userInfo %@",error,[error userInfo]);
        } else {
            // 模态弹出appstore
            [self presentViewController:storeProductViewContorller animated:YES completion:^{
                
            }];
        }
    }];
}

//AppStore取消按钮监听
- (void)productViewControllerDidFinish:(SKStoreProductViewController *)viewController
{
    [[UINavigationBar appearance] setTintColor:kMainColor];
    [self dismissViewControllerAnimated:YES completion:^{
        
    }];
}

5.UIImageView上添加Button不能响应点击事件

    UIButton *startBtn = [UIButton buttonWithType:UIButtonTypeCustom];
    startBtn.frame = CGRectMake(0, 0, 120, 30);
    startBtn.top = self.pageControl.bottom + 10;
    startBtn.centerX = self.view.centerX;
    [startBtn setTitle:@"开启优活动" forState:UIControlStateNormal];
    [startBtn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
    startBtn.clipsToBounds = YES;
    startBtn.layer.cornerRadius = 3.0;
    [startBtn addTarget:self action:@selector(hiddenGuidView) forControlEvents:UIControlEventTouchUpInside];
    startBtn.backgroundColor = [self randomColor];
    UIColor *normalColor = CSGuidRGBA(224,49,36, 1.0);
    UIColor *highlighedColor = CSGuidRGBA(255,86,64, 1.0);
    [startBtn setBackgroundImage:[self imageWithColor:normalColor] forState:UIControlStateNormal];
    [startBtn setBackgroundImage:[self imageWithColor:highlighedColor] forState:UIControlStateHighlighted];
    // 必须设置imageview交互
    imgView.userInteractionEnabled = YES;
    [imgView addSubview:startBtn];

6.设置tableview.headerView高度

开发过程中若想改变headerView或footerView的高度，需先设置高度，后重新赋值tableHeaderView
self.headerView.height = [DXUtils getGeometricHeight:150];
self.tableView.tableHeaderView = self.headerView;

7.为适应服务器图片，防止图片变形

imgView.clipsToBounds = YES;  //  需先设置此选项
imgView.contentMode = UIViewContentModeScaleAspectFill;

8.返回跟视图弹出新页面

DXBaseNavtionViewController *nav = (DXBaseNavtionViewController *)self.navigationController;
[self.navigationController popToRootViewControllerAnimated:NO];
    
DXMyTicketViewController *ticketVC = [[DXMyTicketViewController alloc]init];
ticketVC.rid = rid;
ticketVC.hidesBottomBarWhenPushed = YES;
[nav pushViewController:ticketVC animated:YES];

9.UITableViewCell中放置UILabel，点击UILabel背景色变透明

- (void)setSelected:(BOOL)selected animated:(BOOL)animated {
    [super setSelected:selected animated:animated];

//    UIColor *backgroundColor = self.statusLabel.backgroundColor;
//    self.statusLabel.backgroundColor = [UIColor redColor];
    // Configure the view for the selected state
}

//  防止cell点击label颜色透明
- (void)setHighlighted:(BOOL)highlighted animated:(BOOL)animated
{
    [super setHighlighted:highlighted animated:animated];
    
    self.statusLabel.backgroundColor = MainAppColor;
}

10.UILabel显示html格式数据

比如html为：
D 41F₄₆C-10C-DN40（1）
//  设置
NSAttributedString * attrStr = [[NSAttributedString alloc]
                                    initWithData: [titleStr dataUsingEncoding:NSUnicodeStringEncoding]
                                    options: @{
                                               NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType, 
NSFontAttributeName: [UIFont fontWithName:@"Helvetica Neue" size:16.0f]
                                               }
                                    documentAttributes:nil error:nil];
titleLabel.attributedText = attrStr;

11.放大uibutton点击区域

- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent*)event {
    CGRect bounds = self.bounds;
    //若原热区小于44x44，则放大热区，否则保持原大小不变
    CGFloat widthDelta = MAX(44.0 - bounds.size.width, 0);
    CGFloat heightDelta = MAX(44.0 - bounds.size.height, 0);
    bounds = CGRectInset(bounds, -0.5 * widthDelta, -0.5 * heightDelta);
    return CGRectContainsPoint(bounds, point);
}

12.uitableview设置默认分割线左右不留白

self.tableView.separatorStyle = UITableViewCellSeparatorStyleSingleLine;

- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
{
    if ([cell respondsToSelector:@selector(setLayoutMargins:)]) {
        [cell setLayoutMargins:UIEdgeInsetsZero];
    }
    if ([cell respondsToSelector:@selector(setSeparatorInset:)]){
        [cell setSeparatorInset:UIEdgeInsetsZero];
    }
}

13.xib设置视图高度为0.5（即1px）不起作用

在xib中设置视图高度为0.5时，系统默认更改为1，此时若想使用小数，则需将该约束拖入相应视图中设置一下即可：
{
    __weak IBOutlet NSLayoutConstraint *sepViewConstraint;
}
sepViewConstraint.constant = 0.5;

14.引入prefixheader文件

工程 -> targets -> 项目名称 -> Build Settings，搜索prefix header ->
设置“$(SRCROOT)/工程名称/PrefixHeader文件名称”（如：$(SRCROOT)/XibLayerTool/PrefixHeader.h）

iOS 开发常用笔记

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