ios 12 iphone

1, Xcode6 in the iphone5 simulator run TextField does not eject the keyboardHardware->keyboard->toggle software Keyboard manually activating the keyboard2. Click Return to receive the keyboard(1) Hold down CTRL, select TextField, and drag to Viewcontroller to connect the two.(2) Add the @interface line in. h.(3) Add code in. M:-(BOOL) Textfieldshouldreturn: (Uitextfield *) TextField{if (TextField = = Self.addtextfield) {Addtextfield is the name of the TextField[TextField Resignfirstresponder];}r

, then the strings are equal> However, in the actual development, remember not to use = = To determine the two strings of equal> to determine if two strings are equal , you must use the method that NSString provides to usIsequaltostring*/nsstring *str2 = @ "ABCDEFGH";nsstring *STR3 = @ "abcdeeee";BOOL isequal = [str2 isequaltostring: STR3];NSLog (@ "IsEqual%@", isequal?) @ "YES" : @ "NO");/*5. Isequaltostring 's enhanced version compare> Compare compares ASCII values> The return value is an enum

*) toolbar Didclickbutton: (nycomposetoolbarbuttontype) buttontype{Switch(ButtonType) { CaseNycomposetoolbarbuttontypecamera://Photo//[self opencamera];Nylog (@ "---take photos"); Break; CaseNycomposetoolbarbuttontypepicture://albumsNylog (@ "---album");//[self openalbum]; Break; CaseNycomposetoolbarbuttontypemention:// @Nylog (@"--- @"); Break; CaseNycomposetoolbarbuttontypetrend:// #Nylog (@"--- #"); Break; CaseNycomposetoolbarbuttontypeemotion://emoticons \ KeyboardNylog (@ "---e

IOS network analysis-(12 UIWebView Introduction), iosuiwebview In this article, we only need to know what UIWebView is. UIWebView is a UI control provided by Apple to display webpages. It is also the most memory-occupied control. After iOS8.0, A webkit framework emerged. WKWebView saves 1/4 ~ compared with UIWebView ~ 1/3 of memory, fast, but no cache function. For some shopping app web pages, it is essenti

------1. Storage details of objectsclass to create objects, each object in memory occupies a certain amount of storage space, each object has a separate member variable, all the object common class member method, method in the whole memory only one copy, the class itself in memory occupies a storage space, the method of class exists here.Example:#import Person.h file@interface Person:nsobject{int _age;NSString *_name;}-(void) run;@endPERSON.M file@implementation person-(void) run{NSLog (@ "peopl

to create a new type, should you choose a value type or a reference type? When you use the Cocoa Framework, many NSObject of the APIs are subclasses, then you have to use reference types, that is class . In other cases, here are some guidance suggestions you can refer to:Cases where value types are used: ==when using an operator to compare instance data. When you want to copy an instance data separately. When working with data in a multithreaded environment. Use a referenc

1:delegate Application. h#import 2: Realize UIButton display in different state[Btn settitle:@ "more" forstate:uicontrolstatenormal]; [Btn settitle:@] "forstate:uicontrolstateselected"; Btn.titleLabel.font = [Uifont systemfontofsize:12]; [btn Settitlecolor:[uicolor Blackcolor] forstate:uicontrolstatenormal]; [btn Settitlecolor:[uicolor Blackcolor] forstate:uicontrolstateselected]; btn.adjustsimagewhenhighlighted = NO; [Btn setimage:[

Afnetworking is the standard of many corporate network frameworks, and its basic structure is as follows:AF consists of the following five modulesNetwork communication module (nsurlsession) Network Status Monitoring module (reachability) network communication Security Policy Module (security) network communication information serialization / Anti-serialization Module (serialization) for iOS UIKit Library Extensions (UIKit)The core is the communicati