Details of the WeChat moments review function, and details of the moments review function

Detail consideration and implementation of the circle of friends comment function, details of the circle of friends comment function1. circle of friends The layout of the circle of friends is very easy, and there are a lot of similar code on the

IOS 21st-day notes (ARC memory management-Copy-proxy), ios-copy-

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

Differences between Copy and MutableCopy: copymutablecopy

Differences between Copy and MutableCopy: copymutablecopy NSString * string = @ "origion"; NSString * stringCopy = [string copy]; NSMutableString * stringMCopy = [string mutableCopy]; [stringMCopy appendString :@"!! "]; Note the following points

Use of Reveal, use of Reveal

Use of Reveal, use of Reveal   First, download the Reveal tool. Reveal: http://revealapp.com/download. The Download page is shown in. Select the Download Trail blue button to Download the file:       2. Create a new project as a Demo for Reveal

Add and delete friends for XMPP and add friends for xmpp

Add and delete friends for XMPP and add friends for xmpp In the current communication service, there are various standards, so there will be a lack of connectivity, and the emergence of XMPP (Extensible Message and presence Protocol) Protocol, the

UICollectionView basics, uicollectionview

UICollectionView basics, uicollectionview UICollectionViewFlowLayout *flowLayout= [[UICollectionViewFlowLayout alloc] init];    flowLayout.scrollDirection = UICollectionViewScrollDirectionVertical;// Scroll direction    flowLayout.minimumLineSpacing

Ui basics (I), UI BASICS (

Ui basics (I), UI BASICS ( This article and later sections mainly explain some of the knowledge and key points that must be mastered in studying the UI and IOS development. Of course, it is best to learn these knowledge based on c and oc. If there

What is the possibility of a control invisible to the naked eye ?, Invisible to the naked eye

What is the possibility of a control invisible to the naked eye ?, Invisible to the naked eye 1. This control is not instantiated at all.2. No dimension is set.3. The color of the control is the same as the background color of the parent control

The layer mask attribute is used to achieve the animation effect gradually revealed.

The layer mask attribute is used to achieve the animation effect gradually revealed. Github saw a good animation (https://github.com/rounak/RJImageLoader), so I want to achieve the following by myself do not know, this animation really does not

[Learning notes] [OC language] class method, learning notes oc Language

[Learning notes] [OC language] class method, learning notes oc Language 1. Basic ConceptsMethods that can be directly executed using class names (Classes occupy storage space in the memory, including the class \ object method List) 2. Comparison

[Learning notes] [OC language] set Method and get method, learning notes ocsetget

[Learning notes] [OC language] set Method and get method, learning notes ocsetget 1. Use Cases of the set and get Methods@ Public members can be assigned a value at will. The set and get methods should be used to manage member access (such as

How to Improve tableView performance and tableView Performance

How to Improve tableView performance and tableView Performance A. Reuse cell We all know that it takes time to apply for memory, especially frequent memory application within a period of time will cause a great deal of overhead, and the cell

CLLocationManagerDelegate does not call didUpdateLocations (MAP), cllocationmanager

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

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

Some basic animation effects of layers and layer animation Effects

Some basic animation effects of layers and layer animation Effects # Define kRadianToDegrees (radian) (radian * 180.0)/(M_PI) // Flashing [Self. testView. layer addAnimation: [self opacityForever_Animation: 0.5] forKey: nil]; // Move [Self. testView.

Simple use of FMDB, simple use of FMDB

Simple use of FMDB, simple use of FMDBCommon FMDB classes: FMDatabase: A single SQLite database used to execute SQL statements.FMResultSet: Execute to query an FMDatabase result set, which is similar to the android Cursor.FMDatabaseQueue: this class

IOS-Purchase type view

IOS-Purchase type view Custom purchase type view Code // Payment page format-(UIView *) CellForRowAtRow :( NSInteger) row {UIView * itemView = [UIView viewWithFrame: CGRectMake (0, 0, viewWidth ()-20, 45) andBkColor: [UIColor clearColor]; NIDASSERT

IOS-event handling for controls responding to user control events

IOS-event handling for controls responding to user control eventsNot all objects in iOS can process events. Only objects that inherit UIResponder can receive and process events. We call it "responder object". UIApplication, UIViewController, and

Copy, kvc, and kvo in iOS

Copy, kvc, and kvo in iOSThere are two methods to copy an object.Copy: returns an immutable copy.Only NSString to NSString must be copied in shortest mode, and others must be in deep copy mode. Deep copy object: Specifies the shortest copy pointer.

IOS system Message notification

IOS system Message notificationI. keyboard1. UIKeyboardWillShowNotification-the keyboard to be displayed2. UIKeyboardDidShowNotification-display keyboard3. UIKeyboardWillHideNotification-to hide the keyboard4. UIKeyboardDidHideNotification-the

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