iOS notes (some common points of knowledge)

This is a few notes I made when I was doing a project in the company ....

1.iphone Development--Change the color of the dots in the Uipagecontrol

Pagecontrol.currentpageindicatortintcolor = [Uicolor blackcolor];

Pagecontrol.pageindicatortintcolor = [Uicolor Graycolor];

2.ios How to turn the status bar into white

[[UIApplication sharedapplication]setstatusbarstyle:uistatusbarstylelightcontent];

If not, please add View controller-based status bar appearance no in Info.plist

you can refer to http://beyondvincent.com/blog/2013/11/03/120-customize-navigation-status-bar-ios-7/

3. For example: Modify the navigation bar default title "Yi Yun Mei Printing" color and font

self. title=@ "Yi Yun Mei Printing";

self. navigationcontroller.navigationbar.titletextattributes=@{uitextattributetextcolor:[ Uicolor whitecolor],uitextattributefont:[uifont boldsystemfontofsize:]};

4. Set a fillet for the label

Label.layer.borderwidth=1.0f;

label.layer.cornerradius=5.0f;

5. Manual rotation of the status bar must implement the following method

-(BOOL) shouldautorotate

{

return NO;

}

-(Nsuinteger) supportedinterfaceorientations

{

return uiinterfaceorientationmaskportrait;

}

6. How to set only vertical screen display

Modify Info.plist inside Supportedinterfaceorientations Set Item to portrait on it, this setting is global.

7. Use Uicolor to show #f6f6f6 this traditional color converted to a decimal f6 of 240

Then Uicolor *color=[uicolor colorwithred:255.0 Green: +/255.0 Blue:240 /255.0 Alpha:1];

8. Create categories, extensions, agreements, empty files

Cmd+n Select the type of objective-c file--File type (class, extension, protocol, empty file) inside iOS source

9. Convert the view to a picture

Convert a view to a picture

Uigraphicsbeginimagecontext (oppositeImageView.bounds.size);

[Oppositeimageview.layer Renderincontext:uigraphicsgetcurrentcontext ()];

UIImage *oppositeimg=uigraphicsgetimagefromcurrentimagecontext ();

Uigraphicsendimagecontext ();

10. Drag effect for picture view

-(void) Viewdidload {

[Super Viewdidload];

//Create a picture view

ImageView = [[Uiimageview alloc] Initwithframe:cgrectmake (+, +, +) ];

imageview.userinteractionenabled=YES;

Imageview.image=[uiimage imagenamed:@ "Ad_1"];

//panning gestures

Uipangesturerecognizer *pan = [[Uipangesturerecognizer alloc] Initwithtarget: Self action:@selector (panaction:)];

[ImageView Addgesturerecognizer:pan];

[self. View Addsubview:imageview];

}

Drag events for panning gestures

-(void) Panaction: (Uipangesturerecognizer *) pan

{

Cgpoint point=[pan Translationinview:self. view];

Pan.view.center=cgpointmake (Pan.view.center.x+point.x, PAN.VIEW.CENTER.Y+POINT.Y);

[Pan Settranslation:cgpointzero InView:self. view];

}

11. Pictures can respond to events, such as Uitextview added to the picture can be dragged.

backgrondimage.userinteractionenabled=YES;

iOS notes (some common points of knowledge)