小碎片

作者: Blunet | 来源:发表于2016-04-11 12:02 被阅读0次

    做项目过程中留意的一些小东西,略作记录:

    //设备名称

    NSString * phoneName = [[UIDevice currentDevice] systemName];

    //设备系统版本

    NSString * phoneVersion = [[UIDevice currentDevice] systemVersion];

    //设备型号

    NSString * phoneModel = [[UIDevice currentDevice] model];

    //返回传入字符串的高度(指定lab的宽度求动态高度)

    - (CGFloat)lab_h:(NSString *)str

    {

    NSDictionary *attribute = @{NSFontAttributeName: [UIFont systemFontOfSize:15]};

    CGSize size2 = [str boundingRectWithSize:CGSizeMake(__Main_W-40, MAXFLOAT) options: NSStringDrawingTruncatesLastVisibleLine | NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading attributes:attribute context:nil].size;

    return size2.height;

    }

    //设置navGationBar的背景图片

    [self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"btOk2"] forBarMetrics:UIBarMetricsDefault]

    //单利

    static InvitationManager *sharedInstance = nil;

    + (instancetype)sharedInstance{

    static dispatch_once_t onceToken;

    dispatch_once(&onceToken, ^{

    sharedInstance = [[self alloc] init];

    });

    return sharedInstance;

    }(这里使用instancetype相比于id来说更好,instancetype指明返回数据为当前类对象,而id返回的时未知类型对象,这样使用instancetype就提高了编译器性能,并在编译过程中能检测出返回对象是否适用与一些方法。总结一下,instancetype的作用,就是使那些非关联返回类型的方法返回所在类的类型!)

    //判断输入的字符是否全是数字的方法

    - (BOOL)isPureNumandCharacters:(NSString *)string

    {

    string = [string stringByTrimmingCharactersInSet:[NSCharacterSet decimalDigitCharacterSet]];

    if(string.length > 0)

    {

    return NO;

    }

    return YES;

    }

    //控制webView是返回上级页面还是返回上个网页的方法

    if ([WebView canGoBack]) {

    [WebView goBack];

    }else

    {

    [self.navigationController popToRootViewControllerAnimated:YES];

    }

    //解决图片拉伸过程中出现的失真的问题

    {

        CGFloat top = 25;

        CGFloat bottom = 25;

        CGFloat left = 25;

        CGFloat right = 25;

        UIEdgeInsets insets = UIEdgeInsetsMake(top, left, bottom, right);

         imageView.image = [ima.image resizableImageWithCapInsets:insets resizingMode:UIImageResizingModeStretch];

    }

    //跳转到appStore

    -(void)goToAppStore

    {

    NSString *str = [NSString stringWithFormat:

    @"itms-apps://ax.itunes.apple.com/WebObjects/MZStore.woa/wa/viewContentsUserReviews?type=Purple+Software&id=%@",APP_STORE_ID];

    if( ([[[UIDevice currentDevice] systemVersion] doubleValue]>=7.0)){

    str = [NSString stringWithFormat:@"itms-apps://itunes.apple.com/app/id%@",APP_STORE_ID];

    }

    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:str]];

    }

    //获取webView当前页面的网址

    NSString * URL = webView.request.URL.absoluteString;

    //隐藏webView页面的部分

    [webView stringByEvaluatingJavaScriptFromString:@"var list=document.getElementsByClassName('footer');list[0].style.display='none';"];

    //mjRefresh在ARC下

    #pragma mjRefreash

    - (void)addFooterRefrish

    {

    __weak typeof(UITableView) *weaktable = _public_table;

    }

    //上传问题

    1----正在上传的文件中断或者删除,再次Submit提示:

    Cannot proceed with delivery: an existing transporter instance is currently uploading this package。----------解决办法:前往/Users/bei/.itmstransporter/UploadTokens/删除目录下所有内容再次上传

    //ios10适配问题小结:直接引用网络资源

    http://blog.csdn.net/heyddo/article/details/52623099

    cocoapods新资源https://gems.ruby-china.org

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