Objective-C Memory Management Being Exceptional 異常處理與記憶體,memorymanagementObjective-C Memory Management Being Exceptional 異常處理與記憶體3.1Cocoa requires that all exceptions must be of type NSExceptioncocoa 需要所有的異常是NSException類型的。so even though you
iOS動畫——啥?AutoLayout還能做動畫? 是的,很明確的告訴各位看官,AutoLayout的確能做動畫。AutoLayout是用來做各種約束,是用來適配不同螢幕的,那麼當我們改變其中某些約束並講這個改變的過程以緩慢的速度顯示,那麼是不是就實現了動畫~ 先來看一個酷炫的動畫,這個動畫由書籍iOS Animations by tutorials提供: 由書籍iOS Animations by
UIView-圖層方法,uiview-圖層//// ViewController.m// UIView-圖層概念//// Created by wangtouwang on 15/5/5.// Copyright (c) 2015年 wangtouwang. All rights reserved.//#import "ViewController.h"@interface ViewController ()@property(nonatomic,strong) UIView
Objective,objectivecObjective - c Foundation 架構詳解2 Collection AgencyCocoa provides a number of collection classes such as NSArray and NSDictionary whose instances exist just to hold onto other
Objective,objectivec Objective - c Chapter 1 Hello world 1.1 1.2.On the Welcome screen, click "Create a new Xcode project" (see Figure 2-1), or just chooseFile ->New ->New Project. 1.3.在main裡寫如下代碼
IOS viewDidLoad方法被執行兩次(viewDidLoad和loadView方法詳解)為了搞清楚viewDidLoad、loadView等方法的用途和調用順序,寫了一個小demo,不料viewDidLoad方法被執行了兩次,模擬器也一直是黑屏。查看了這兩個方法的官方解釋後找到了錯誤原因和解決方案。首先來看UIViewController.h檔案中對viewDidLoad方法的解釋:- (void)viewDidLoad; // Called after the view has
ios 系統內建的菊花(UIActivityIndicatorView)指標 //// RootViewController.m// UIActivityIndicatorViewDemo//// Created by Dubai on 15/4/28.// Copyright (c) 2015年 Dubai. All rights reserved.// #import "RootViewController.h" @interface