#import "ViewController.h"
#import "RunloopViewController.h"
@interface ViewController ()
@property (nonatomic , assign) NSInteger currentIndex;
@property (nonatomic) CADisplayLink * timerInC;
@property (nonatomic) UIImageView * imgV;
@property (nonatomic) NSTimer * timerInN;
@property (nonatomic) dispatch_source_t timerInG;
@property (nonatomic , assign) BOOL nsTimerResume;
@property (nonatomic , assign) BOOL gcdTimerResume;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor = [UIColor grayColor];
self.imgV = [[UIImageView alloc] initWithFrame:CGRectMake(, , , )];
self.imgV.contentMode = UIViewContentModeScaleAspectFill;
self.imgV.center = self.view.center;
[self.view addSubview:self.imgV];
UIButton * button = [UIButton buttonWithType:(UIButtonTypeSystem)];
[button setFrame:CGRectMake(, , , )];
button.center = CGPointMake(self.view.center.x - , self.view.center.y + );
[self.view addSubview:button];
[button setTitle:@"CADisplayLink" forState:(UIControlStateNormal)];
[button setBackgroundColor:[UIColor whiteColor]];
[button addTarget:self action:@selector(CADisplayLinkAction) forControlEvents:(UIControlEventTouchUpInside)];
UIButton * button1 = [UIButton buttonWithType:(UIButtonTypeSystem)];
[button1 setFrame:CGRectMake(, , , )];
button1.center = CGPointMake(self.view.center.x, self.view.center.y + );
[self.view addSubview:button1];
[button1 setTitle:@"NSTimer" forState:(UIControlStateNormal)];
[button1 setBackgroundColor:[UIColor whiteColor]];
[button1 addTarget:self action:@selector(NSTimerAction) forControlEvents:(UIControlEventTouchUpInside)];
UIButton * button2 = [UIButton buttonWithType:(UIButtonTypeSystem)];
[button2 setFrame:CGRectMake(, , , )];
button2.center = CGPointMake(self.view.center.x + , self.view.center.y + );
[self.view addSubview:button2];
[button2 setTitle:@"GCDTimer" forState:(UIControlStateNormal)];
[button2 setBackgroundColor:[UIColor whiteColor]];
[button2 addTarget:self action:@selector(GCDTimerAction) forControlEvents:(UIControlEventTouchUpInside)];
UIButton * button3 = [UIButton buttonWithType:(UIButtonTypeSystem)];
[button3 setFrame:CGRectMake(, , , )];
button3.center = CGPointMake(self.view.center.x, self.view.center.y + );
[self.view addSubview:button3];
[button3 setTitle:@"看看Runloop" forState:(UIControlStateNormal)];
[button3 setBackgroundColor:[UIColor whiteColor]];
[button3 addTarget:self action:@selector(gotoRunloopAction) forControlEvents:(UIControlEventTouchUpInside)];
}
-(void)viewWillAppear:(BOOL)animated
{
[self initTimer];
}
-(void)initTimer
{
///target selector 模式初始化一个实例
self.timerInC = [CADisplayLink displayLinkWithTarget:self selector:@selector(changeImg)];
///暂停
self.timerInC.paused = YES;
///selector触发间隔
self.timerInC.frameInterval = ;
///加入一个runLoop
[self.timerInC addToRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
self.timerInN = [NSTimer timerWithTimeInterval:0.032 target:self selector:@selector(changeImg) userInfo:nil repeats:YES];
self.timerInN.fireDate = [NSDate distantFuture];
self.nsTimerResume = YES;
[[NSRunLoop currentRunLoop] addTimer:self.timerInN forMode:NSDefaultRunLoopMode];
self.gcdTimerResume = YES;
}
-(void)changeImg
{
self.currentIndex ++;
if (self.currentIndex > ) {
self.currentIndex = ;
}
self.imgV.image = [UIImage imageNamed:[NSString stringWithFormat:@"%ld.jpg",self.currentIndex]];
}
-(void)CADisplayLinkAction
{
self.nsTimerResume = YES;
self.timerInN.fireDate = [NSDate distantFuture];
if (self.timerInG && !self.gcdTimerResume) {
dispatch_suspend(self.timerInG);
self.gcdTimerResume = YES;
}
self.timerInC.paused = !self.timerInC.paused;
}
-(void)NSTimerAction
{
self.timerInC.paused = YES;
if (self.timerInG && !self.gcdTimerResume) {
dispatch_suspend(self.timerInG);
self.gcdTimerResume = YES;
}
self.timerInN.fireDate = self.nsTimerResume?
[NSDate distantPast]:[NSDate distantFuture];
self.nsTimerResume = !self.nsTimerResume;
}
-(void)GCDTimerAction
{
if (self.gcdTimerResume) {
self.timerInC.paused = YES;
self.nsTimerResume = YES;
self.timerInN.fireDate = [NSDate distantFuture];
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
self.timerInG = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, , , dispatch_get_main_queue());
dispatch_source_set_timer(self.timerInG, dispatch_walltime(NULL, * NSEC_PER_SEC), 0.032 * NSEC_PER_SEC, );
dispatch_source_set_event_handler(self.timerInG, ^{
[self changeImg];
});
});
dispatch_resume(self.timerInG);
}
else
{
dispatch_suspend(self.timerInG);
}
self.gcdTimerResume = !self.gcdTimerResume;
}
- (void)gotoRunloopAction
{
[self.timerInC invalidate];
self.timerInC = nil;
[self.timerInN invalidate];
self.timerInN = nil;
if (self.timerInG) {
if (self.gcdTimerResume) {
dispatch_resume(self.timerInG);
}
dispatch_source_cancel(self.timerInG);
self.timerInG = nil;
}
RunloopViewController * vc = [[RunloopViewController alloc] init];
[self.navigationController pushViewController:vc animated:YES];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end