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//设置tabbar有被选中的效果，添加背景 self.tabBar.selectionIndicatorImage = [UIImageimageNamed:@"tabon_bg"];

//这个frame是初设的，没关系，后面还会重新设置其size。NSDictionary *attributes = @{NSFontAttributeName:[UIFont systemFontOfSize:20],};NSString *str = @"这里是lab里的内容";CGSize textSize = [str boundingRectWithSize:CGSizeMa

//设置tabBar的背景颜色，使用的方法//设置tabbar的背景//tabBar和navigationBar结合使用,tabBarItem的图片设置

//未被选中的图片效果不变    [navigtion.tabBarItemsetTitleTextAttributes:[NSDictionarydictionaryWithObjectsAndKeys:[UIColorwhiteColor], NSForegroundColorAttributeName,nil] forState:UIControlStateNor

问题描述：just found out something: If you have a Tabbar combined with a NavigationController (that has some views on it's stack) and you double click the TabBarItem, the view pops to the first ViewCon

给tableView添加手势UITapGestureRecognizer *gesture = [[UITapGestureRecognizeralloc]initWithTarget:selfaction:@selector(resignKeyBoardGestureWithTableView:)];    gesture.cancelsTouchesInView =NO

给tableView或scrollview添加手势1.UITapGestureRecognizer *gesture = [[UITapGestureRecognize alloc]initWithTarget:self action:@selector(resignKeyBoardGestureWithTableView:)];2.gesture.cancelsTouches

NSString *regex = @"^[a-zA-Z0-9\u4e00-\u9fa5]+$";    NSPredicate *pre = [NSPredicatepredicateWithFormat:@"SELF MATCHES %@",regex];    BOOL isMatch = [pre evaluateWithObject:str];   

在控制器里viewDidLoad里加入以下代码self.navigationController.navigationBar.translucent =NO;self.automaticallyAdjustsScrollViewInsets =NO;

在第一个控制器的跳转代码里加入：self.hidesBottomBarWhenPushed =YES;MorePlayRecordsViewController *morePlayRecordsVC = [MorePlayRecordsViewControllernew];morePlayRecordsVC.morePlayRecordsTag = [NSStr

for (UIViewController *tempin self.navigationController.viewControllers)    {        if ([temp isKindOfClass:[MyLoginViewController class]])        {            [self.navigationC

UIFont *font = [UIFontfontWithName:@"Arial-ItalicMT"size:21];    NSDictionary *dic =@{NSFontAttributeName:font, NSForegroundColorAttributeName: [UIColorwhiteColor]};    self.naviga

self.tabBarController.selectedIndex =0;

打包的时候出现 Library not loaded:@rpath/BoringSSL.framework ............. Reason: image not foundtarget->general->embedded binaries中加入动态库（.framework文件）