{"id":1443,"date":"2018-11-29T17:42:15","date_gmt":"2018-11-29T09:42:15","guid":{"rendered":"http:\/\/www.yusian.com\/blog\/?p=1443"},"modified":"2020-12-01T21:26:10","modified_gmt":"2020-12-01T13:26:10","slug":"%e5%ae%9a%e6%97%b6%e5%99%a8nstimer%e3%80%81cadisplaylink%e5%8f%8a%e4%bb%a3%e7%90%86nsproxy%e7%9a%84%e5%9f%ba%e6%9c%ac%e4%bd%bf%e7%94%a8","status":"publish","type":"post","link":"https:\/\/www.yusian.com\/blog\/project\/2018\/11\/29\/1742151443.html","title":{"rendered":"\u5b9a\u65f6\u5668NSTimer\u3001CADisplayLink\u53ca\u4ee3\u7406NSProxy\u7684\u57fa\u672c\u4f7f\u7528"},"content":{"rendered":"<p>1\u3001NSTimer\u5e38\u7528\u7684\u4e24\u79cd\u65b9\u5f0f\uff1ascheduled\u4e0e\u4f7f\u7528Runloop addTimer<\/p>\n<pre lang=\"objc\" line=\"1\">\r\n[NSTimer scheduledTimerWithTimeInterval:1.0 repeats:YES block:^(NSTimer * _Nonnull timer) {\r\n    NSLog(@\"code...\");\r\n}];\r\n[NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(timerMethod) userInfo:nil repeats:YES];\r\n    \r\nNSTimer *timer = [NSTimer timerWithTimeInterval:1.0 repeats:YES block:^(NSTimer * _Nonnull timer) {\r\n    NSLog(@\"code...\");\r\n}];\r\n[[NSRunLoop currentRunLoop] addTimer:timer forMode:NSDefaultRunLoopMode];\r\n\r\nNSTimer *timer = [NSTimer timerWithTimeInterval:1.9 target:self selector:@selector(timerMethod) userInfo:nil repeats:YES];\r\n[[NSRunLoop currentRunLoop] addTimer:timer forMode:NSDefaultRunLoopMode];<\/pre>\n<p>2\u3001CADisplayLink\u5e38\u7528\u7684\u65b9\u5f0f\u662faddToRunloop<\/p>\n<pre lang=\"objc\" line=\"1\">\r\nCADisplayLink *link = [CADisplayLink displayLinkWithTarget:[SAProxy proxyWithTarget:self] selector:@selector(linkMethod)];\r\n[link addToRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];<\/pre>\n<p>3\u3001\u8fd9\u4e24\u4e2a\u5b9a\u65f6\u5668\u7684\u672c\u8d28\u90fd\u662f\u52a0\u5165\u5230runloop\u4e2d\u5faa\u73af\u8c03\u7528\uff0c\u56e0\u6b64\u5bf9\u8c61\u672c\u8eab\u4f1a\u88abRunLoop\u5f15\u7528\uff0c\u9700\u8981\u5728\u4e1a\u52a1\u4e0a\u4e3b\u52a8\u5c06\u5176\u7f6e\u4e3a\u5931\u6548\u53ef\u91ca\u653e\uff0c\u8fd9\u6837\u4e00\u6765\u5c31\u5bb9\u6613\u4f7f\u5b9a\u65f6\u5668\u81ea\u8eab\u4e0e\u8c03\u7528\u8005\u5f62\u6210\u5faa\u73af\u5f15\u7528\u7684\u5173\u7cfb\uff1b<\/p>\n<p>4\u3001\u73b0\u5728\u7684\u95ee\u9898\u662f\u5b9a\u65f6\u5668\u5728\u4f7f\u7528\u7684\u65f6\u5019\u4f1a\u88ab\u5916\u90e8\u5f15\u7528\uff0c\u800c\u5b9a\u65f6\u5668\u53c8\u53ef\u80fd\u76f4\u63a5\u5f15\u7528\u4e86\u4e1a\u52a1\u63a7\u5236\u5668\uff0c\u4e1a\u52a1\u63a7\u5236\u5668\u9700\u8981\u5728\u91ca\u653e\u65f6\u5c06\u5b9a\u65f6\u5668\u9500\u6bc1\uff0c\u53ef\u5b9a\u65f6\u5668\u5f15\u7528\u4e86\u4e1a\u52a1\u63a7\u5236\u5668\uff0c\u4e1a\u52a1\u63a7\u5236\u5668\u4e0d\u4f1a\u88ab\u9500\u6bc1\uff1b\u89e3\u51b3\u601d\u8def\u662f\u907f\u514d\u5b9a\u65f6\u5668\u76f4\u63a5\u5f15\u7528\u63a7\u5236\u5668\uff0c\u800c\u662f\u5f15\u7528\u4e00\u4e2a\u4ee3\u7406\u7c7b\uff0c\u8ba9\u4ee3\u7406\u7c7b\u5f31\u5f15\u7528\u63a7\u5236\u5668\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u89e3\u51b3\u5faa\u73af\u5f15\u7528\u7684\u95ee\u9898\uff1b<\/p>\n<p>5\u3001\u6240\u8c13\u7684\u4ee3\u7406\u53ef\u4ee5\u662f\u4efb\u4f55\u5bf9\u8c61\uff0c\u56e0\u4e3a\u53ea\u9700\u8981\u5b8c\u6210\u6240\u6709\u7684\u65b9\u6cd5\u8c03\u7528\u8f6c\u53d1\u7ed9\u4e1a\u52a1\u5668\u5c31\u884c\uff0c\u53c2\u8003\uff1a<a href=\"http:\/\/www.yusian.com\/blog\/project\/2018\/11\/20\/173037.html\" rel=\"noopener noreferrer\" target=\"_blank\">Objective-C\u6d88\u606f\u53d1\u9001\u673a\u5236\u539f\u7406objc_msgSend( )<\/a>\uff0c\u4e5f\u53ef\u4ee5\u4f7f\u7528NSProxy\uff0c\u4e13\u4e1a\u4ee3\u7406\u7c7b\uff1b<\/p>\n<p>6\u3001NSProxy\u7684\u4f5c\u7528\u4e5f\u662f\u6d88\u606f\u8f6c\u53d1\uff0c\u76f8\u6bd4\u5e38\u89c4\u7684\u7c7b\u5b9e\u73b0NSProxy\u7701\u53bb\u4e86\u7236\u7c7b\u65b9\u6cd5\u9012\u5f52\u67e5\u627e\u7684\u8fc7\u7a0b\uff0c\u66f4\u9ad8\u6548\uff0c\u57fa\u672c\u539f\u7406\u662f\u76f8\u540c\u7684\uff0c\u5b9e\u73b0methodSignatureForSelector:\u4e0eforwardInvocation:\u65b9\u6cd5<\/p>\n<pre lang=\"objc\" line=\"1\">@interface SAProxy : NSProxy\r\n@property (nonatomic, weak) id  target;\r\n@end\r\n\r\n@implementation SAProxy\r\n+ (instancetype)proxyWithTarget:(id)target\r\n{\r\n    SAProxy *proxy = [SAProxy alloc];\r\n    proxy.target = target;\r\n    return proxy;\r\n}\r\n\r\n- (NSMethodSignature *)methodSignatureForSelector:(SEL)sel\r\n{\r\n    return [self.target methodSignatureForSelector:sel];\r\n}\r\n- (void)forwardInvocation:(NSInvocation *)invocation\r\n{\r\n    [invocation invokeWithTarget:self.target];\r\n}\r\n@end<\/pre>\n<p>7\u3001\u4e1a\u52a1\u63a7\u5236\u5668\u53c2\u8003\u4ee3\u7801\uff1a<\/p>\n<pre lang=\"objc\" line=\"1\">@interface ViewController ()\r\n{\r\n    NSTimer *_timer;\r\n}\r\n@end\r\n\r\n@implementation ViewController\r\n\r\n- (void)viewDidLoad {\r\n    [super viewDidLoad];\r\n    _timer = [NSTimer scheduledTimerWithTimeInterval:1.0\r\n                                              target:[SAProxy proxyWithTarget:self]\r\n                                            selector:@selector(timerMethod)\r\n                                            userInfo:nil\r\n                                             repeats:YES];\r\n}\r\n- (void)timerMethod\r\n{\r\n    NSLog(@\"%s\", __func__);\r\n}\r\n- (void)dealloc\r\n{\r\n    [_timer invalidate];\r\n    NSLog(@\"%s\", __func__);\r\n}\r\n@end<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>1\u3001NSTimer\u5e38\u7528\u7684\u4e24\u79cd\u65b9\u5f0f\uff1ascheduled\u4e0e\u4f7f\u7528Runloop addTimer [NSTimer scheduledTimerWithTimeInterval:1.0 repeats:YES block:^(NSTimer * _Nonnull timer) { NSLog(@&#8221;code&#8230;&#8221;); }]; [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(timerMethod) userInfo:nil repeats:YES]; NSTimer *timer = [NSTimer timerWithTimeInterval:1.0 repeats:YES block:^(NSTimer * _Nonnull timer) { NSLog(@&#8221;code&#8230;&#8221;); }]; [[NSRunLoop currentRunLoop] addTimer:timer forMode:NSDefaultRunLoopMode]; NSTimer *timer = [NSTimer timerWithTimeInterval:1.9 target:self selector:@selector(timerMethod) userInfo:nil repeats:YES]; [[NSRunLoop currentRunLoop] addTimer:timer forMode:NSDefaultRunLoopMode]; 2\u3001CADisplayLink\u5e38\u7528\u7684\u65b9\u5f0f\u662faddToRunloop CADisplayLink *link = [CADisplayLink displayLinkWithTarget:[SAProxy proxyWithTarget:self] [&hellip;]<\/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":[],"class_list":["post-1443","post","type-post","status-publish","format-standard","hentry","category-project"],"_links":{"self":[{"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/posts\/1443","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=1443"}],"version-history":[{"count":0,"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/posts\/1443\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/media?parent=1443"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/categories?post=1443"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/tags?post=1443"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}