ios图片的原生（graphics）详解及实例
一，效果图。
二，工程图。
三，代码。
rootviewcontroller.h
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#import <uikit/uikit.h>@interface rootviewcontroller : uiviewcontroller@end |
rootviewcontroller.m
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#import "rootviewcontroller.h"@interface rootviewcontroller ()@end@implementation rootviewcontroller- (id)initwithnibname:(nsstring *)nibnameornil bundle:(nsbundle *)nibbundleornil{ self = [super initwithnibname:nibnameornil bundle:nibbundleornil]; if (self) { // custom initialization } return self;}- (void)viewdidload{ [super viewdidload]; // do any additional setup after loading the view. //背景图 [self addview]; }#pragma -mark -functions//背景图-(void)addview{ uiimageview *imageview=[[uiimageview alloc]initwithframe:cgrectmake(50, 100, 44, 44)]; imageview.image=[self defaultimage]; [self.view addsubview:imageview];}//图片原生-(uiimage *)defaultimage { static uiimage *defaultimage = nil; static dispatch_once_t oncetoken; dispatch_once(&oncetoken, ^{ uigraphicsbeginimagecontextwithoptions(cgsizemake(20.f, 13.f), no, 0.0f); [[uicolor blackcolor] setfill]; [[uibezierpath bezierpathwithrect:cgrectmake(0, 0, 20, 1)] fill]; [[uibezierpath bezierpathwithrect:cgrectmake(0, 5, 20, 1)] fill]; [[uibezierpath bezierpathwithrect:cgrectmake(0, 10, 20, 1)] fill]; [[uicolor whitecolor] setfill]; [[uibezierpath bezierpathwithrect:cgrectmake(0, 1, 20, 2)] fill]; [[uibezierpath bezierpathwithrect:cgrectmake(0, 6, 20, 2)] fill]; [[uibezierpath bezierpathwithrect:cgrectmake(0, 11, 20, 2)] fill]; defaultimage = uigraphicsgetimagefromcurrentimagecontext(); uigraphicsendimagecontext(); }); return defaultimage;}- (void)didreceivememorywarning{ [super didreceivememorywarning]; // dispose of any resources that can be recreated.} |
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