IOS Study Notes 2015-03-20 OC-value type, 2015-03-20oc-

IOS Study Notes 2015-03-20 OC-value type, 2015-03-20oc- 1. defined in Objective-C, we can use the numeric data types in c, such as int, float, and long. They are all basic data types, not objects. That is to say, messages cannot be sent to them.

IOS. OC.03 KVO-key-value observer, ios. oc.03kvo-

IOS. OC.03 KVO-key-value observer, ios. oc.03kvo- KVO Key, Value, Observing, that is, Key-Value observer. It provides such a mechanism that when the attributes of a specified object change, KVO automatically notifies the corresponding

IOS UINavigationController-navigation bar controller, ioscontroller jump

IOS UINavigationController-navigation bar controller, ioscontroller jump The parent class of any controller is UIViewController, and the navigation bar controller is no exception. It is a subclass of UIViewController. 1. What is a navigation bar

IOS mode view, switching between views, and ios Mode

IOS mode view, switching between views, and ios Mode 1. Simple switching between views. Switching between views is actually switching between view controllers. Because the controllers attempt to have views on them, and the controllers attempt to

Implementation of the OC Singleton mode and the OC Mode

Implementation of the OC Singleton mode and the OC Mode SingleClass. m # Import @ class SingleClass; static SingleClass * instance = nil; @ interface SingleClass: NSObject + (instancetype) using instance; @ end @ implementation SingleClass //

IOS development-data storage (Direct Writing, NSUserDefaults, NSkeyedArchiver)

IOS development-data storage (Direct Writing, NSUserDefaults, NSkeyedArchiver)Data storage (Direct Writing, NSUserDefaults, NSkeyedArchiver)Common File Access methods in ios include: 1. directly write files. The stored objects include NSString,

Common iOS time methods

Common iOS time methods // Date before the current day NSDate * today = [NSDate date];   // Time Zone NSTimeZone * zone = [NSTimeZone systemTimeZone];   // Set the interval _ Interval = [zone secondsFromGMTForDate: today];   // Today + 8 hours

In ios development, javascript calls the oc Code directly instead of modifying the url callback method.

In ios development, javascript calls the oc Code directly instead of modifying the url callback method. In the previous ios project, you must use UIWebview to open a static page and Call the relevant object-c code.  I. Previous methods for calling

IOS monitors changes in textField values in real time

IOS monitors changes in textField values in real timeConsidering the proxy method: TextFieldDidEndEditing cannot listen for real-time changes in textFiled. To implement real-time monitoring, we recommend that you register a notification to listen

IOS phone, text message, and so on

IOS phone, text message, and so on The simplest and most direct method: Jump directly to the dialing Interface 1 NSURL * url = [NSURL URLWithString: @ "tel: // 10010"]; [[UIApplication sharedApplication] openURL: url]; Disadvantages After the phone

IOS UICollectionView getting started 07 click cell to enlarge the image

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IOS File Management 2 and ios File Management

IOS File Management 2 and ios File ManagementIOS development-File Management (2) 5. Plist files Add in String Mode NSString * path = [NSHomeDirectory () stringByAppendingPathComponent: @ "Array. plist"]; NSString * content = @ "abcd "; [Contect

HTML5's seven major advantages: "forced Palace" APP and html5's seven forced palaces app

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2. iOS development UI-program startup principle and UIApplication, 2. iosuiapplication

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IOS Study Notes 2015-03-20 OC-array, 2015-03-20oc-

IOS Study Notes 2015-03-20 OC-array, 2015-03-20oc- [NSArray] the element of an array in Definition 1 immutable array 2 oc can be an element of any object 3. The address of the element contained in the number 2. initialize NSArray * variable =

On iOS, double-click Home to switch

On iOS, double-click Home to switch If you double-click Home, you will be taken to the iOS App's switcher page, where the App suspended by the current system is listed. The screen-cutting of each App is displayed. I believe everyone is familiar

IOS method mixed write (swizzling .)

IOS method mixed write (swizzling .) Swizzling in OC refers to the transparent replacement of one method with another. Simply put, it is to replace the method at runtime. Mixed write can be used to change the behavior of objects without source code (

Force horizontal screen on ios camera interface

Force horizontal screen on ios camera interface By default, cameras in IOS call systems use portrait screens. Many methods are found online to force landscape screens to be invalid. The following code is tested to be compatible with ios78. Customize

IOS block programming guide 5 blocks and variables

IOS block programming guide 5 blocks and variablesBlocks and Variables (Block and variable) This article describes the interaction between blocks and variables, including memory management. This article describes the internal relationship between

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