IOS

Particle effect in iOS Animation04. Particle Animation 1. effect: Randomly draw a path, click the start button, particle Animation2. Implementation ideas 1. Create a canvas to draw a path and customize the view. 2. Add a pan gesture to the custom

IOS Touch ID and iostouchid 1. First import the header file #import 2. Key code -(Void) validateTouchID {LAContext * context = [[LAContext alloc] init]; NSError * error; NSString * tip = @ "verify existing mobile phone fingerprints by using the

Mantle's use of personal opinions The previous month, I came into contact with Mantle. Because the project adopts the MVC design model, it is also crucial to choose a good model. Let's first introduce the use of Mantle. First, define the data model:

Animation lagging of the navigation controller in pushViewController, When debugging the navigation controller yesterday, we found that the animation was choppy during push. The code for the choppy problem was as follows: 1-(void) tableView :(

Several Methods for IOS to cache images locally Caching images locally is used in many scenarios. If you only store text information, you can create a plist file or database to easily solve the problem, however, it would be less convenient to store

Knowledge points of IOS array NSArray and NSMutableArray, two-dimensional nsarray Array This article summarizes the knowledge points of arrays NSArray and NSMutableArray, mainly for some common operations. For other operations, see the relevant

[Study Notes] [OC language] polymorphism, learning notes oc Polymorphism 1. Basic concepts of PolymorphismMultiple forms of a certain type of thingOC object with Polymorphism 2. embodiment of PolymorphismPerson * p = [Student new];P-> age = 100;[P

Common iOS development macros #define NavigationBar_HEIGHT 44#define SCREEN_WIDTH ([UIScreen mainScreen].bounds.size.width)#define SCREEN_HEIGHT ([UIScreen mainScreen].bounds.size.height)#define SAFE_RELEASE(x) [x release];x=nil#define IOS_VERSION [[

How to view reference count changes in the ARC environment?   1. Create a new project to test the changes in the reference count.       2. Find the following path: Build Phases ----> Compile Sources ----> AppDelegate. m       3. Select the

IOS time format description In the iOS time stamp string NSdate conversion demo, we talked about   -(IBAction) strToDate :( id) sender { NSString * timeStr = @ 15:00:00; NSDate * date = [NSDate dateFromString: timeStr format: @ yyyy-MM-dd HH: mm:

[Learning notes] [OC language] self keyword, learning notes ocself 1. member variables and local variables have the same nameWhen the member variables and local variables have the same name, the proximity principle is adopted to access local

Select an item from the drop-down list.   Click the buttons in the menu on the right, and select one from the pop-up list. Respond to the corresponding event and display the text in the menu on the right. The drop-down effect is LMDropdownView, you

IOS 21st-day notes (ARC memory management-Copy-proxy), ios-copy- Knowledge points of IOS Learning (oc language)   1. ARC memory management in OC 1) Principle of releasing the object memory in ARC: Check whether the object is strongly referenced to

Use of iOS. UI advanced Block, ios. uiblock Simplest block usageThree steps to use block: 1. Define block variables 2. Create block code blocks 3. Call block anonymous Functions Defines the composition of a block, including the return value, block

CLLocationManagerDelegate does not call didUpdateLocations (MAP), cllocationmanagerThis is because of the location permission setting problem caused by xcode upgrade.After upgrading xcode6, open the previous xcode5 project and the program cannot be

IOS local notifications and IOS notifications On mobile devices, only one application is active. If some other applications receive new messages or change at this time, they must be notified to users, you can use the notification mechanism to notify

IOS learning 20th-day notes (memory management in OC), iosoc Knowledge points of IOS Learning (oc language)   1. Memory Management in OC1) concept: the memory management object is all objects that inherit NSObject and is invalid for basic data (such

Temple, temple Database -XML property list (plist) Archiving-Preference (Preference setting)-NSKeyedArchiver archiving (NSCoding)-SQLite3-Core Data Summary: Common Data Storage Methods for IOS apps-XML property list (plist) archive-Preference

Add startup authorization for iOS8 UILocalNotification   I haven't accessed UILocalNotification for a long time. I found that I have no permission to start the notification today.The error is as follows: Attempting to schedule a local notification

Common Properties and methods of UIView for iPone Application DevelopmentIPone Application Development UIView common attributes and Methods common attributes alpha view transparency 0.0f-1.0f backgroundColor view background color set of subviews