zoukankan      html  css  js  c++  java
  • iOS 7 Development Tips, Tricks & Hacks


    iOS 7 Development Tips, Tricks & Hacks
    September 18, 2013
    Like with any new iOS version there are a bunch of new tricks and hacks to work out. Here are a few things that weren't immediately obvious to me, it's in no way a complete set, just things that I happened to come across.
    If you've got any more then send them to me on Twitter or by email and I'll add them here with full credit to you.
    Stealing The Blur
    Unfortunately Apple didn't give access to their blur effect directly for you to use on your views. Luckily some clever people worked out you could just steal the layer from a UIToolbar. iOS-blur
    If you want dark style blur set the toolbar barStyle to UIBarStyleBlack.
    Tinting The Navbar
    Setting the tint color but it's not tinting? Turns out there's another tint property called 'barTintColor';
       self.navigationController.navigationBar.barTintColor = [UIColor blueColor];
    Nil Those Delegates
    With iOS 7 you need to nil out your delegates and datasources before your controllers are dealloc'd or you will have a lot of nasty 'message sent to deallocated instance' exceptions.
        - (void)dealloc
        {
            self.tableView.delegate = nil;
            self.tableView.dataSource = nil;
        }
    Hide The Status Bar
    Don't you love how that transparent status bar floats over content? Yeah me either.
    The standard call doesn't do the trick any more:
       [[UIApplication sharedApplication] setStatusBarHidden:YES withAnimation:UIStatusBarAnimationFade]
    Set the value UIViewControllerBasedStatusBarAppearance to YES in your Info.plist and add this to your controller:
        - (BOOL)prefersStatusBarHidden
        {
            return YES;
        }
    Changing The Status Bar Style Per Controller
    Set the value UIViewControllerBasedStatusBarAppearance to YES in your Info.plist and override:
     - (UIStatusBarStyle)preferredStatusBarStyle
     {
         return UIStatusBarStyleLightContent;
     }
    Custom Back Button And Swipe Back
    The only nice way I found to actually completely override the back button is to set the leftBarButtonItem, but then the swipe back gesture breaks. Luckily it's an easy fix when you know how:
        self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc]
                                                 initWithImage:img
                                                 style:UIBarButtonItemStylePlain
                                                 target:self
                                                 action:@selector(onBack:)];
        self.navigationController.interactivePopGestureRecognizer.delegate = (id<UIGestureRecognizerDelegate>)self;
    Full Screen Content Transition
    When full screen content is shown (say a video is expanded) and the user switches orientation and then closes you will often get an exception. Turns out preferredInterfaceOrientationForPresentation is now a required method.
        - (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
        {
            return UIInterfaceOrientationPortrait;
        }
    Checking For iOS 7
    Nothing new here, but useful if you want to perform something only on iOS 7:
        if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0) {
            ...
        } 
    My Scroll View Is Moving!
    iOS 7 offsets your scroll view 64px (20px for the status bar and 44px for the navigation bar) by default, you can disable this though:
      self.automaticallyAdjustsScrollViewInsets = NO;
    CocoaPods Is Breaking in Xcode 5
    Check out this link.

  • 相关阅读:
    jq中$(function(){})与原生window.onload的区别
    利用window.parent调用Iframe父页面变量、方法的爬坑之路
    前端跨域3种基本解决方案
    MySQL按日期分组统计(按天统计,按月统计)
    go读取文件内容写入另一文件中
    C++中函数返回值是一个对象时的问题
    docker构建dpdk运行环境镜像
    NFS服务安装
    tesseract-4.0.0源码编译安装
    linux系统设置cpu孤立
  • 原文地址:https://www.cnblogs.com/newBlash/p/4351786.html
Copyright © 2011-2022 走看看