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
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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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