{"id":201009,"date":"2020-11-24T15:01:40","date_gmt":"2020-11-24T07:01:40","guid":{"rendered":"http:\/\/4563.org\/?p=201009"},"modified":"2020-11-24T15:01:40","modified_gmt":"2020-11-24T07:01:40","slug":"%e8%af%b7%e9%97%ae%e4%b8%80%e4%b8%8b%e6%9c%89%e4%ba%ba%e9%81%87%e5%88%b0%e8%bf%87-cagradientlayer-%e6%97%a0%e6%b3%95%e6%88%aa%e5%9b%be%e7%9a%84%e9%97%ae%e9%a2%98","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=201009","title":{"rendered":"\u8bf7\u95ee\u4e00\u4e0b\u6709\u4eba\u9047\u5230\u8fc7 CAGradientLayer \u65e0\u6cd5\u622a\u56fe\u7684\u95ee\u9898"},"content":{"rendered":"<div>\n<div>\n<div>\n<h1>                  \u8bf7\u95ee\u4e00\u4e0b\u6709\u4eba\u9047\u5230\u8fc7 CAGradientLayer \u65e0\u6cd5\u622a\u56fe\u7684\u95ee\u9898               <\/h1>\n<p> <\/p>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : pptk <\/span>  <span><i><\/i> 3<\/span> <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<div isfirst=\"1\"> <\/p>\n<p>\u6709\u4ec0\u4e48\u89e3\u51b3\u65b9\u6cd5\u5417<\/p>\n<\/p><\/div>\n<div> <b>\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (<span>1<\/span>)        <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<ul>\n<li data-pid=\"4222542\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u4e3b<\/span> <span>\u8cc7\u6df1\u5927\u4f6c : pptk <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u5df2\u89e3\u51b3<br \/>\/\/\u7ed8\u5236\u6e10\u53d8<br \/> UIColor *firstColor = [[UIColor alloc]initWithCGColor:(CGColorRef)self.bgLayer.colors.firstObject];<br \/> UIColor *lastColor = [[UIColor alloc]initWithCGColor:(CGColorRef)self.bgLayer.colors.lastObject];<br \/> \/\/\u521b\u5efa\u4e00\u4e2a RGB \u7684\u989c\u8272\u7a7a\u95f4<br \/> CGColorSpaceRef rgb = CGColorSpaceCreateDeviceRGB();<br \/> \/\/\u5b9a\u4e49\u6e10\u53d8\u989c\u8272\u6570\u7ec4<br \/> CGFloat colors[] = {<br \/> firstColor.qmui_red, firstColor.qmui_green, firstColor.qmui_blue, 1.00,<br \/> lastColor.qmui_red, lastColor.qmui_green, lastColor.qmui_blue, 1.00<br \/> };<br \/> CGGradientRef _gradient = CGGradientCreateWithColorComponents(rgb, colors, NULL, sizeof(colors)\/(sizeof(colors[0])*4));<br \/> UIGraphicsBeginImageContextWithOptions(self.preImage.size, NO, self.preImage.scale);<br \/> CGContextRef context = UIGraphicsGetCurrentContext();<br \/> CGContextInspectContext(context);<br \/> CGPoint start = CGPointMake(self.preImage.size.width\/2, 0);<br \/> CGPoint end = CGPointMake(self.preImage.size.width\/2, self.preImage.size.height);<br \/> CGContextDrawLinearGradient(context, _gradient, start, end, kCGGradientDrawsBeforeStartLocation);<\/p>\n<p> CGImageRef imageRef = self.preImage.CGImage;<br \/> CGImageRef subImageRef = CGImageCreateWithImageInRect(imageRef,CGRectMakeWithSize(self.preImage.size));<br \/> CGContextDrawImage(context, CGRectMakeWithSize(self.preImage.size), subImageRef);<\/p>\n<p> UIImage *imageOut = UIGraphicsGetImageFromCurrentImageContext();<br \/> UIGraphicsEndImageContext();                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li>\n","protected":false},"excerpt":{"rendered":"<p>\u8bf7\u95ee\u4e00\u4e0b\u6709\u4eba\u9047\u5230\u8fc7 CAGradi&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/201009"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=201009"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/201009\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=201009"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=201009"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=201009"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}