IOS

the KVO mechanism of IOS Overview Key-value Observing (abbreviated KVO): Allows the object to receive notification mechanisms when the properties of the specified object have been modified. Each time a specified object's properties are modified,

When displaying data with Uicollectionview, we sometimes want to tune the cell spacing to a value that we want, and then check the API to see that there is a property: -(CGFloat) minimuminteritemspacing {return 0; } However, in many cases we

Add a class method, and then call directly + (void) Callphonestr: (nsstring*) phonestr WITHVC: (Uiviewcontroller *) selfvc{if (Phonestr.length >=) {NSString * STR2 = [[Uidevice currentdevice] systemversion]; if ([str2 compare:@ "10.2"

First, the effect of the picture: In the project before the use of Uicollectionview to achieve a circular distribution of the menu, but can not rotate with the gesture, just the two days of vacation, reference to some of the great God's article,

1, allow remote events to be accepted [[UIApplication sharedapplication] beginreceivingremotecontrolevents];[Self becomefirstresponder]; This sentence is important, otherwise some devices do not respond -(BOOL) Canbecomefirstresponder { return YES; }

+ (CGFloat) heightforcontent: (Mymsgtextmodel *) content withwidth: (cgfloat) width {cgsize contentsize; if (System_version_greater_than_or_equal_to (@ "7.0")) {Nsmutableparagraphstyle *paragraphstyle = [[NSMutableParagr Aphstyle Alloc]init];

A variety of operational events are encountered in iOS development and can be responded to by programs. First, when an event response occurs, you must know who is responding to the event. In iOS, the responder chain responds to events, all

1 intercept byte[] Part of the data, starting from begin, length is count -(void) Bytesplit2byte: (byte[]) src orc: (byte[]) ORC begin: (Nsinteger) Begin count: (Nsinteger) count{ memset (orc, 0, sizeof (char) *count); for (Nsinteger i = begin; I

Description: This QQ space has updated the previous very basic code iOS Source download: Http://code.662p.com/list/12_1.html Update contentAn update of the landing interfaceThe second increases the input time password and the successful landing

Everyone at the end of the project development, we must encounter a problem is: How to keep a project version of the update function to the user login software hou, if there is a new version, can have relevant prompts to update. First of all, when I

1. Through UIWebView and JS interaction Native and server interaction through Web pages so easy. Of course, to achieve the delegate of WebView. Self.webView.delegate = self; 1.1 iOS Client Calls JS method. Directly using the method of the system

#import "BingChengItemViewCell.h" #import Staticcgrect oldframe;//used to record frame before zooming in @implementation Bingchengitemviewcell -(void) awakefromnib { [Self.bgviewsetcornerradius:5]; } -(void) Loadcontentandimages:

iOS face Test 8 1. Multi-thread stack and heap, respectively, public or private (C) A. Stack public, heap private B. Stack public, heap public C. Stack private, heap public A. Stack public, heap private Explain Generally, stacks are private

iOS face test 9 1. When you use Xcode to create a project, the version management library that supports simultaneous creation is (C) A.subversion B.mercurial C.git D.concurrent Version System 2.UIEdgeInsets edgeinsets = Uiedgeinsetsmake (10,10,1

A few days ago, the blog, customized a Portfolio view, because of the C # event mechanism does not understand, so the View button callback controller way I chose to develop Android often used interface callback. After my colleague pointed out the

Today I met a wonderful bug when I wrote some controls add to a UIView. After running, clicking on the controls on the interface is no problem, but when I click on the UIView blank area, the entire uiview is transparent, including the child controls.

features of the weak property:Weak indicates that the attribute defines a "non-owning relationship" (nonowning relationship).When you set a new value for the weak property, the set method neither retains the new value nor releases the old

Basically each interface in development has a navigation bar to control where each of your interfaces comes from. The usual situation is a return button on the left-hand side of the navigation bar, and the middle text shows what the interface

Record Standbyindicator 1.SVProgressHUD Transparent Indicator Https://github.com/TransitApp/SVProgressHUD 2.MBProgressHUD Https://github.com/jdg/MBProgressHUD Picture 1.SDWebImage Picture Asynchronous loading

divide the viewwillappear and viewdidload, and viewdidload These methods, pay attention to the good order Otherwise, you want to wait for the TableView to refresh the data at the request, but the first request to refresh the data, and then