//献上 刷新UI耗时解决方案
//你的所有异步操作 是否操作UI时是否都会回到主线程?? //iOS 你怎么了 开发者的生态圈怎么了 哎~ 心情不好!typedef BOOL(^RunLoopBlock)(void);@interface ViewController ()//定时器@property(nonatomic,strong) NSTimer *timer;//任务数组@property(nonatomic,strong) NSMutableArray *tasks;//最大任务数@property(nonatomic,assign) NSInteger maxQueueLength;@end@implementation ViewController- (void)viewDidLoad { [super viewDidLoad]; _tasks = [NSMutableArray array]; _maxQueueLength = 18; _timer = [NSTimer scheduledTimerWithTimeInterval:0.01 target:self selector:@selector(timerMothod) userInfo:nil repeats:YES]; [self addRunLoopObserver];}- (void)timerMothod { }+ (void)zhaodacai { NSLog(@"zhadaocai");}- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{ [self addTask:^BOOL{ [ViewController zhaodacai]; return YES; }];}- (void) addTask:(RunLoopBlock)unit { [self.tasks addObject:unit]; if (_tasks.count > _maxQueueLength) { [self.tasks removeObjectAtIndex:0]; }}static void CallBack (CFRunLoopObserverRef observer, CFRunLoopActivity activity, void *info){ ViewController *vc = (__bridge ViewController *)(info); if (vc.tasks.count == 0 ) { return; } BOOL result = NO; while (result == NO && vc.tasks.count) { RunLoopBlock unit = vc.tasks.firstObject; unit(); [vc.tasks removeObjectAtIndex:0]; }}//添加观察者- (void)addRunLoopObserver { CFRunLoopRef runloop = CFRunLoopGetCurrent(); CFRunLoopObserverContext context = { 0, (__bridge void *)(self), &CFRetain, &CFRelease, NULL }; CFRunLoopObserverRef defaultModelObserver; defaultModelObserver = CFRunLoopObserverCreate(NULL, kCFRunLoopBeforeWaiting, YES, NSIntegerMax - 99, &CallBack, &context); CFRunLoopAddObserver(runloop, defaultModelObserver, kCFRunLoopDefaultMode); //c语言必须释放 CFRelease(defaultModelObserver);}