iOS的一些小技巧

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自定义了leftBarbuttonItem左滑返回手势失效了怎么办?

self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc]                                         initWithImage:img                                         style:UIBarButtonItemStylePlain                                         target:self                                         action:@selector(onBack:)];self.navigationController.interactivePopGestureRecognizer.delegate = (id<UIGestureRecognizerDelegate>)self;

ScrollView莫名其妙不能在viewController划到顶怎么办?

self.automaticallyAdjustsScrollViewInsets = NO

键盘事件写的好烦躁,都想摔键盘了,怎么办?

买个结实的键盘.
使用IQKeyboardManager(github上可搜索).
app老是不流畅

去下载KMCGeigerCounter

怎么像safari一样滑动的时候隐藏navigationbar?

self.navigationController.hidesBarsOnSwipe=YES;

设置导航栏的颜色

self.navigationController.navigationBar.titleTextAttributes=[NSDictionarydictionaryWithObjectsAndKeys:[UIColoryellowColor],NSForegroundColorAttributeName,nil];

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