{"id":418,"date":"2014-12-01T13:26:58","date_gmt":"2014-12-01T05:26:58","guid":{"rendered":"http:\/\/www.yusian.com\/blog\/?p=418"},"modified":"2016-07-14T22:48:51","modified_gmt":"2016-07-14T14:48:51","slug":"quartz2d%e7%9a%84%e5%9f%ba%e6%9c%ac%e4%bd%bf%e7%94%a8%ef%bc%88%e7%ac%ac%e4%b8%89%e8%ae%b2%ef%bc%9a%e5%9b%be%e5%bd%a2%e4%b8%8a%e4%b8%8b%e6%96%87%e6%a0%88%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.yusian.com\/blog\/project\/2014\/12\/01\/132658418.html","title":{"rendered":"Quartz2D\u7684\u57fa\u672c\u4f7f\u7528\uff08\u7b2c\u4e09\u8bb2\uff1a\u56fe\u5f62\u4e0a\u4e0b\u6587\u6808\uff09"},"content":{"rendered":"<p>1\u3001\u5728Quartz2D\u7684\u56fe\u5f62\u6837\u5f0f\u8bbe\u7f6e\u4e2d\uff0c\u6240\u6709\u7684\u6837\u5f0f\u90fd\u662f\u9488\u5bf9\u56fe\u5f62\u4e0a\u4e0b\u6587\u7684\uff0c\u53ea\u8981\u8bbe\u7f6e\u4e86\u5373\u4f1a\u6574\u4e2a\u56fe\u5f62\u4e0a\u4e0b\u6587\u751f\u6210\u7684\u56fe\u5f62\u4ea7\u751f\u5f71\u54cd\uff1b<br \/>\n2\u3001\u5177\u4f53\u4e00\u70b9\u8bb2\uff0c\u5982\u679c\u8bbe\u7f6e\u4e86\u7ebf\u6761\u5bbd\u5ea6\u4e3a2\u50cf\u7d20\uff0c\u90a3\u4e48\u540e\u7eed\u7ed8\u5236\u7684\u6240\u6709\u7ebf\u6761\u90fd\u662f2\u50cf\u7d20\u5bbd\uff1b<br \/>\n3\u3001\u5982\u679c\u540e\u7eed\u6709\u4e9b\u7ebf\u6bb5\u53ea\u9700\u89811\u4e2a\u50cf\u7d20\u5bbd\u5219\u91cd\u65b0\u8bbe\u7f6e\u7ebf\u6761\u5bbd\u5ea6\uff0c\u5e76\u4e14\u8be5\u8bbe\u7f6e\u4f1a\u8986\u76d6\u524d\u97622\u4e2a\u50cf\u7d20\u7684\u8bbe\u7f6e\u53c2\u6570\uff1b<br \/>\n4\u3001\u57fa\u4e8e\u8fd9\u79cd\u7279\u6027\uff0c\u5bf9\u4e8e\u56fe\u5f62\u4e0a\u4e0b\u6587\u7684\u53c2\u6570\u8bbe\u7f6eQuartz2D\u5f15\u8fdb\u4e86\u4e00\u4e2a\u56fe\u5f62\u4e0a\u4e0b\u6587\u6808\u7684\u6982\u5ff5\uff1b<br \/>\n5\u3001\u4f7f\u7528\u975e\u5e38\u7b80\u5355\uff0c\u53ea\u9700\u89812\u6b65\uff1b<br \/>\n5.1\u3001\u5c06\u5f53\u524d\u56fe\u5f62\u4e0a\u4e0b\u6587\u8bbe\u7f6e\u5165\u6808\uff1aCGContextSaveGState(CGContextRef c)\uff1b<br \/>\n5.2\u3001\u5c06\u4fdd\u5b58\u7684\u56fe\u5f62\u4e0a\u4e0b\u6587\u6062\u590d\u5230\u5f53\u524d\u7684\u4e0a\u4e0b\u6587\u8bbe\u7f6e\u4e2d\uff1aCGContextRestoreGState(CGContextRef c)\uff1b<br \/>\n6\u3001\u5165\u6808\u4e0e\u51fa\u6808\u64cd\u4f5c\u4e00\u822c\u6210\u5bf9\u51fa\u73b0\uff0c\u5e76\u4e14\u53ef\u4ee5\u5d4c\u5957\uff1b<br \/>\n7\u3001\u793a\u4f8b\u8bf4\u660e\uff1a<br \/>\n7.1\u3001\u51fd\u6570graphOne()\u4e3a\u672a\u4f7f\u7528\u56fe\u5f62\u4e0a\u4e0b\u6587\u6808\u7684\u6548\u679c\uff0cgraphTwo()\u4e3a\u4f7f\u7528\u4e86\u56fe\u5f62\u4e0a\u4e0b\u6587\u6808\u7684\u6548\u679c<!--more--><\/p>\n<pre lang=\"objc\" line=\"1\">\/\/\n\/\/  SAView.m\n\/\/  Quartz2D\n\/\/\n\/\/  Created by \u4f59\u897f\u5b89 on 14\/12\/1.\n\/\/  Copyright (c) 2014\u5e74 Sian. All rights reserved.\n\/\/\n\n#import \"SAView.h\"\n\n@implementation SAView\n\n-(void)drawRect:(CGRect)rect\n{\n    graphTwo();\n}\n\nvoid graphOne()\n{\n    \/\/ 1\u3001\u83b7\u53d6\u4e0a\u4e0b\u6587(\u5f00\u542f\u5f53\u524d\u7ed8\u56fe\u677f)\n    CGContextRef c = UIGraphicsGetCurrentContext();\n    \n    \/\/ \u7ed8\u5236\u7b2c\u4e00\u6761\u7ebf\u6bb5\n    \/\/ 2.1\u3001\u8bbe\u7f6e\u7ebf\u5bbd\u4e3a10\u50cf\u7d20\u3001\u7ebf\u7aef\u4e3a\u5706\u89d2\n    CGContextSetLineWidth(c, 10.0);\n    CGContextSetLineCap(c, kCGLineCapRound);\n    \n    \/\/ 2.2\u3001\u63cf\u8ff0\u4e00\u6761\u7ebf\u6bb5\u4ece\u70b9(50, 150)\u5230(250, 150);\n    CGContextMoveToPoint(c, 50, 150);\n    CGContextAddLineToPoint(c, 250, 150);\n    \n    \/\/ 2.3\u3001\u6e32\u67d3\u5f53\u524d\u7ebf\u6bb5\u5230\u56fe\u5c42\n    CGContextStrokePath(c);\n    \n    \/\/ \u7ed8\u5236\u7b2c\u4e8c\u6761\u7ebf\u6bb5\n    \/\/ 3.1\u3001\u63cf\u8ff0\u4e00\u6761\u7ebf\u6bb5\u4ece\u70b9(250, 150)\u5230(250, 300)\n    CGContextMoveToPoint(c, 250, 150);\n    CGContextAddLineToPoint(c, 250, 300);\n    \n    \/\/ 3.2\u6e32\u67d3\u5f53\u524d\u7ebf\u6bb5\u5230\u56fe\u5c42\n    CGContextStrokePath(c);\n}\n\nvoid graphTwo()\n{\n    \/\/ 1\u3001\u83b7\u53d6\u4e0a\u4e0b\u6587(\u5f00\u542f\u5f53\u524d\u7ed8\u56fe\u677f)\n    CGContextRef c = UIGraphicsGetCurrentContext();\n    CGContextSaveGState(c);\n    \n    \/\/ 2.1\u3001\u8bbe\u7f6e\u7ebf\u5bbd\u4e3a10\u50cf\u7d20\u3001\u7ebf\u7aef\u4e3a\u5706\u89d2\n    CGContextSetLineWidth(c, 10.0);\n    CGContextSetLineCap(c, kCGLineCapRound);\n    \n    \/\/ 2.2\u3001\u63cf\u8ff0\u4e00\u6761\u7ebf\u6bb5\u4ece\u70b9(50, 150)\u5230(250, 150);\n    CGContextMoveToPoint(c, 50, 150);\n    CGContextAddLineToPoint(c, 250, 150);\n    \n    \/\/ 3\u3001\u6e32\u67d3\u5f53\u524d\u7ebf\u6bb5\u5230\u56fe\u5c42\n    CGContextStrokePath(c);\n    \n    \/\/ \u8fd8\u539f\u4e4b\u524d\u7684\u4e0a\u4e0b\u6587\n    CGContextRestoreGState(c);\n    \n    \/\/ \u63cf\u8ff0\u4e00\u6761\u7ebf\u6bb5\u4ece\u70b9(250, 150)\u5230(250, 300)\n    CGContextMoveToPoint(c, 250, 150);\n    CGContextAddLineToPoint(c, 250, 300);\n    \/\/ \u6e32\u67d3\u5f53\u524d\u7ebf\u6bb5\u5230\u56fe\u5c42\n    CGContextStrokePath(c);\n}\n\n@end<\/pre>\n<p>7.2\u3001\u8fd0\u884c\u6548\u679c\u56fe\uff1a\uff08\u5de6\u4e3agraphOne()\u7684\u7ed3\u679c\uff0c\u53f3\u4e3agraphTow()\u7684\u7ed3\u679c\uff09<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone  wp-image-419\" src=\"http:\/\/www.yusian.com\/blog\/wp-content\/uploads\/2016\/07\/iOS-\u6a21\u62df\u5668\u5c4f\u5e55\u5feb\u7167\u201c2014\u5e7412\u67081\u65e5-\u4e0b\u53481.24.18\u201d.png\" alt=\"iOS \u6a21\u62df\u5668\u5c4f\u5e55\u5feb\u7167\u201c2014\u5e7412\u67081\u65e5 \u4e0b\u53481.24.18\u201d\" width=\"280\" height=\"420\" \/><img loading=\"lazy\" decoding=\"async\" class=\"alignnone  wp-image-420\" src=\"http:\/\/www.yusian.com\/blog\/wp-content\/uploads\/2016\/07\/iOS-\u6a21\u62df\u5668\u5c4f\u5e55\u5feb\u7167\u201c2014\u5e7412\u67081\u65e5-\u4e0b\u53481.24.47\u201d.png\" alt=\"iOS \u6a21\u62df\u5668\u5c4f\u5e55\u5feb\u7167\u201c2014\u5e7412\u67081\u65e5 \u4e0b\u53481.24.47\u201d\" width=\"280\" height=\"420\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>1\u3001\u5728Quartz2D\u7684\u56fe\u5f62\u6837\u5f0f\u8bbe\u7f6e\u4e2d\uff0c\u6240\u6709\u7684\u6837\u5f0f\u90fd\u662f\u9488\u5bf9\u56fe\u5f62\u4e0a\u4e0b\u6587\u7684\uff0c\u53ea\u8981\u8bbe\u7f6e\u4e86\u5373\u4f1a\u6574\u4e2a\u56fe\u5f62\u4e0a\u4e0b\u6587\u751f\u6210\u7684\u56fe\u5f62\u4ea7\u751f\u5f71\u54cd\uff1b 2\u3001\u5177\u4f53\u4e00\u70b9\u8bb2\uff0c\u5982\u679c\u8bbe\u7f6e\u4e86\u7ebf\u6761\u5bbd\u5ea6\u4e3a2\u50cf\u7d20\uff0c\u90a3\u4e48\u540e\u7eed\u7ed8\u5236\u7684\u6240\u6709\u7ebf\u6761\u90fd\u662f2\u50cf\u7d20\u5bbd\uff1b 3\u3001\u5982\u679c\u540e\u7eed\u6709\u4e9b\u7ebf\u6bb5\u53ea\u9700\u89811\u4e2a\u50cf\u7d20\u5bbd\u5219\u91cd\u65b0\u8bbe\u7f6e\u7ebf\u6761\u5bbd\u5ea6\uff0c\u5e76\u4e14\u8be5\u8bbe\u7f6e\u4f1a\u8986\u76d6\u524d\u97622\u4e2a\u50cf\u7d20\u7684\u8bbe\u7f6e\u53c2\u6570\uff1b 4\u3001\u57fa\u4e8e\u8fd9\u79cd\u7279\u6027\uff0c\u5bf9\u4e8e\u56fe\u5f62\u4e0a\u4e0b\u6587\u7684\u53c2\u6570\u8bbe\u7f6eQuartz2D\u5f15\u8fdb\u4e86\u4e00\u4e2a\u56fe\u5f62\u4e0a\u4e0b\u6587\u6808\u7684\u6982\u5ff5\uff1b 5\u3001\u4f7f\u7528\u975e\u5e38\u7b80\u5355\uff0c\u53ea\u9700\u89812\u6b65\uff1b 5.1\u3001\u5c06\u5f53\u524d\u56fe\u5f62\u4e0a\u4e0b\u6587\u8bbe\u7f6e\u5165\u6808\uff1aCGContextSaveGState(CGContextRef c)\uff1b 5.2\u3001\u5c06\u4fdd\u5b58\u7684\u56fe\u5f62\u4e0a\u4e0b\u6587\u6062\u590d\u5230\u5f53\u524d\u7684\u4e0a\u4e0b\u6587\u8bbe\u7f6e\u4e2d\uff1aCGContextRestoreGState(CGContextRef c)\uff1b 6\u3001\u5165\u6808\u4e0e\u51fa\u6808\u64cd\u4f5c\u4e00\u822c\u6210\u5bf9\u51fa\u73b0\uff0c\u5e76\u4e14\u53ef\u4ee5\u5d4c\u5957\uff1b 7\u3001\u793a\u4f8b\u8bf4\u660e\uff1a 7.1\u3001\u51fd\u6570graphOne()\u4e3a\u672a\u4f7f\u7528\u56fe\u5f62\u4e0a\u4e0b\u6587\u6808\u7684\u6548\u679c\uff0cgraphTwo()\u4e3a\u4f7f\u7528\u4e86\u56fe\u5f62\u4e0a\u4e0b\u6587\u6808\u7684\u6548\u679c<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[16],"class_list":["post-418","post","type-post","status-publish","format-standard","hentry","category-project","tag-quartz2d"],"_links":{"self":[{"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/posts\/418","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/comments?post=418"}],"version-history":[{"count":0,"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/posts\/418\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/media?parent=418"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/categories?post=418"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/tags?post=418"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}