iOS Development Basics-Fragmentation 8

1: Use Uiimageview as the background, but direct the button or

The Uitextfield cannot be placed above the corresponding event.

Workaround: Uiimageview default userinteractionenabled is no, modify it to Yes, or you can directly have a property on the view above Xcode tick the user Interaction enabled scene ( Put a picture view in the scrolling view, put a button on the picture view, and find that there is no response effect.

2:afnetworking newspaper "Request failed:unacceptable content-type:text/html"

corresponding to their own projects, I use afnetworking this set of network request package, need to change is: AFURLRESPONSESERIALIZATION.M file 223 line: Self.acceptablecontenttypes = [ nssetsetwithobjects:@ "Application/json", @ "text/html", @ "Text/json", @ "Text/javascript", nil]; plus @ "text/html", part, is actually adding a data format that the server returns.

Conversion of 3:nsmutablearray and Nsarray to each other

Nsarray--Nsmutablearray  nsmutablearray *mymutablearray = [MyArray mutablecopy];  Nsmutablearray--Nsarray  nsarray *myarray = [Mymutablearray copy];  

4: Customize the Back button above the system navigation bar, as well as the text, right favorite button

 Middle title UILabel *navlabel = [[UILabel alloc] Initwithframe:cgrectmake (0, 0, 320, 44)];   Navlabel.text = @ "group purchase Details";   Navlabel.textcolor = [Uicolor Whitecolor];   Navlabel.font = [Uifont systemfontofsize:18];   Navlabel.textalignment = Nstextalignmentcenter;       Self.navigationItem.titleView = Navlabel;   Right collection button UIButton *rightbutton = [UIButton buttonwithtype:uibuttontypecustom];   Rightbutton.frame = CGRectMake (0, 0, 20, 20);   [Rightbutton Setbackgroundimage:load_image (@ "Meishoucang") forstate:uicontrolstatenormal];   [Rightbutton addtarget:self Action: @selector (Doshoucang) forcontrolevents:uicontroleventtouchupinside];   Uibarbuttonitem *rightitem = [[Uibarbuttonitem alloc] Initwithcustomview:rightbutton];       Self.navigationItem.rightBarButtonItem = Rightitem;   Left return button UIButton *fanhuibutton = [UIButton buttonwithtype:uibuttontypecustom];   Fanhuibutton.frame = CGRectMake (0, 0, 30, 40); [Fanhuibutton Setbackgroundimage:load_image (@ "Fanhuijiantou") forstate:uicontrolsTatenormal];   [Fanhuibutton addtarget:self Action: @selector (Dofanhui) forcontrolevents:uicontroleventtouchupinside];   Uibarbuttonitem *leftitem = [[Uibarbuttonitem alloc] Initwithcustomview:fanhuibutton]; Self.navigationItem.leftBarButtonItem = Leftitem; the title font on the navigation bar, the font size can be defined so that full use of the system's [ Self.navigationController.navigationBar settitletextattributes:[nsdictionary Dictionarywithobjectsandkeys: [ Uicolor colorwithred:1.0/255 green:1.0/255 blue:1.0/255 alpha:1], Uitextattributetextcolor,[uicolor ClearColor], Uitextattributetextshadowcolor,[uifont Systemfontofsize:20],uitextattributefont,nil]];

5: Clean the bottom empty column of UITableView

Self.tableView.tableFooterView = [[UIView alloc] init];

6: How to hide the right mouse button after navigation jump

Hide the return self.navigationitem.hidesbackbutton=yes;//to the left of the head Hide head right self.navigationitem.rightbarbuttonitem.customview.hidden=yes;

7: If you want to set the background map for the Uicollectionviewcontroller view

UIImage *image=[uiimage imagenamed:@ "APPBG"];self.collectionview.layer.contents= (ID) image. Cgimage;

8: Can be modified in other places Rootviewcontroller

UIWindow *window = [UIApplication Sharedapplication].keywindow;    Window.rootviewcontroller = [[Hvwtabbarviewcontroller alloc] init];

9: Sina Weibo authorized login warning:attempt to present on whose

View isn't in the window hierarchy!

Introductoryviewcontroller *introductory=[mainstoryboard instantiateviewcontrollerwithidentifier:@ " Introductoryview "];        Uinavigationcontroller *rootnavigationcontroller=[[uinavigationcontroller Alloc] Initwithrootviewcontroller: Introductory];            Self.window.rootviewcontroller=rootnavigationcontroller; The main problem is a jump to B, then B put a button to authorize Sina Weibo, add a uinavigationcontroller, Then in a jump to B with nav jump:    uistoryboard *mainstoryboard=[uistoryboard storyboardwithname:@ "Main" bundle:nil];    loginviewcontroller* Loginviewcontroll=[mainstoryboard instantiateviewcontrollerwithidentifier:@ " Loginviewcontroller "];    [Self.navigationcontroller pushviewcontroller:loginviewcontroll  Animated:yes];

10: In the introduction of the third party TCWEIBOSDK newspaper linker command failed with exit

Code1 (use-v to see invocation)

Because of the repeated introduction of the Libtcweibosdk class library, Targets-project-build Phases-link Binary with libraries, there are three libtcweibosdk, can delete libtcweibosdk-i386.a

11:nsuserdefaults Store min nsdictionary

Note: The data types supported by Nsuserdefaults are NSString, NSNumber, NSDate, Nsarray, Nsdictionary, BOOL, Nsinteger, Nsfloat, and other system-defined data types. Problem encountered this time: when the value inside the nsdictionary is null, the Nsuserdefaults is reported as an exception (attempt to insert Non-property List object); Workaround: Filter the values in the dictionary , empty to convert null values into strings; The code is as follows (create an extension Class): @implementation nsdictionary (Common)-(nsdictionary *) changedictionarynotnill{    Nsmutabledictionary *muresult=[[nsmutabledictionary Alloc]init];    Nsenumerator *enumerator=[self Keyenumerator];    ID key;    while ((Key=[enumerator Nextobject]) {        ID value=[self objectforkey:key];        if ((NSNull *) value==[nsnull null]) {            [Muresult setobject:@ "" Forkey:key];        }        else        {            [Muresult setobject:value forkey:key];        }    }    return muresult;} @end

iOS Development Basics-Fragmentation 8