刷新UI耗时解决方案

最新推荐文章于 2021-03-26 12:11:06 发布

weixin_33881041

最新推荐文章于 2021-03-26 12:11:06 发布

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文章标签： ui c# 移动开发

原文链接：https://my.oschina.net/zhaodacai/blog/840414

2019独角兽企业重金招聘Python工程师标准>>>

//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<UITouch *> *)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);
}

转载于:https://my.oschina.net/zhaodacai/blog/840414