1 #import "ViewController.h"
2 #import "RunloopViewController.h"
3 @interface ViewController ()
4
5 @property (nonatomic , assign) NSInteger currentIndex;
6
7 @property (nonatomic) CADisplayLink * timerInC;
8
9 @property (nonatomic) UIImageView * imgV;
10
11 @property (nonatomic) NSTimer * timerInN;
12
13 @property (nonatomic) dispatch_source_t timerInG;
14
15 @property (nonatomic , assign) BOOL nsTimerResume;
16
17 @property (nonatomic , assign) BOOL gcdTimerResume;
18
19 @end
20
21 @implementation ViewController
22
23 - (void)viewDidLoad {
24 [super viewDidLoad];
25
26 self.view.backgroundColor = [UIColor grayColor];
27
28 self.imgV = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 200, 200)];
29 self.imgV.contentMode = UIViewContentModeScaleAspectFill;
30 self.imgV.center = self.view.center;
31 [self.view addSubview:self.imgV];
32
33
34 UIButton * button = [UIButton buttonWithType:(UIButtonTypeSystem)];
35 [button setFrame:CGRectMake(0, 0, 100, 30)];
36 button.center = CGPointMake(self.view.center.x - 110, self.view.center.y + 200);
37 [self.view addSubview:button];
38 [button setTitle:@"CADisplayLink" forState:(UIControlStateNormal)];
39 [button setBackgroundColor:[UIColor whiteColor]];
40 [button addTarget:self action:@selector(CADisplayLinkAction) forControlEvents:(UIControlEventTouchUpInside)];
41
42 UIButton * button1 = [UIButton buttonWithType:(UIButtonTypeSystem)];
43 [button1 setFrame:CGRectMake(0, 0, 100, 30)];
44 button1.center = CGPointMake(self.view.center.x, self.view.center.y + 200);
45 [self.view addSubview:button1];
46 [button1 setTitle:@"NSTimer" forState:(UIControlStateNormal)];
47 [button1 setBackgroundColor:[UIColor whiteColor]];
48 [button1 addTarget:self action:@selector(NSTimerAction) forControlEvents:(UIControlEventTouchUpInside)];
49
50
51 UIButton * button2 = [UIButton buttonWithType:(UIButtonTypeSystem)];
52 [button2 setFrame:CGRectMake(0, 0, 100, 30)];
53 button2.center = CGPointMake(self.view.center.x + 110, self.view.center.y + 200);
54 [self.view addSubview:button2];
55 [button2 setTitle:@"GCDTimer" forState:(UIControlStateNormal)];
56 [button2 setBackgroundColor:[UIColor whiteColor]];
57 [button2 addTarget:self action:@selector(GCDTimerAction) forControlEvents:(UIControlEventTouchUpInside)];
58
59 UIButton * button3 = [UIButton buttonWithType:(UIButtonTypeSystem)];
60 [button3 setFrame:CGRectMake(0, 0, 100, 30)];
61 button3.center = CGPointMake(self.view.center.x, self.view.center.y + 240);
62 [self.view addSubview:button3];
63 [button3 setTitle:@"看看Runloop" forState:(UIControlStateNormal)];
64 [button3 setBackgroundColor:[UIColor whiteColor]];
65 [button3 addTarget:self action:@selector(gotoRunloopAction) forControlEvents:(UIControlEventTouchUpInside)];
66 }
67
68 -(void)viewWillAppear:(BOOL)animated
69 {
70 [self initTimer];
71 }
72
73 -(void)initTimer
74 {
75 ///target selector 模式初始化一个实例
76 self.timerInC = [CADisplayLink displayLinkWithTarget:self selector:@selector(changeImg)];
77 ///暂停
78 self.timerInC.paused = YES;
79 ///selector触发间隔
80 self.timerInC.frameInterval = 2;
81 ///加入一个runLoop
82 [self.timerInC addToRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
83 self.timerInN = [NSTimer timerWithTimeInterval:0.032 target:self selector:@selector(changeImg) userInfo:nil repeats:YES];
84 self.timerInN.fireDate = [NSDate distantFuture];
85 self.nsTimerResume = YES;
86 [[NSRunLoop currentRunLoop] addTimer:self.timerInN forMode:NSDefaultRunLoopMode];
87 self.gcdTimerResume = YES;
88 }
89
90 -(void)changeImg
91 {
92 self.currentIndex ++;
93 if (self.currentIndex > 75) {
94 self.currentIndex = 1;
95 }
96 self.imgV.image = [UIImage imageNamed:[NSString stringWithFormat:@"%ld.jpg",self.currentIndex]];
97 }
98
99 -(void)CADisplayLinkAction
100 {
101 self.nsTimerResume = YES;
102 self.timerInN.fireDate = [NSDate distantFuture];
103 if (self.timerInG && !self.gcdTimerResume) {
104 dispatch_suspend(self.timerInG);
105 self.gcdTimerResume = YES;
106 }
107 self.timerInC.paused = !self.timerInC.paused;
108 }
109
110 -(void)NSTimerAction
111 {
112 self.timerInC.paused = YES;
113
114 if (self.timerInG && !self.gcdTimerResume) {
115 dispatch_suspend(self.timerInG);
116 self.gcdTimerResume = YES;
117 }
118 self.timerInN.fireDate = self.nsTimerResume?
119 [NSDate distantPast]:[NSDate distantFuture];
120 self.nsTimerResume = !self.nsTimerResume;
121 }
122
123 -(void)GCDTimerAction
124 {
125 if (self.gcdTimerResume) {
126 self.timerInC.paused = YES;
127 self.nsTimerResume = YES;
128 self.timerInN.fireDate = [NSDate distantFuture];
129 static dispatch_once_t onceToken;
130 dispatch_once(&onceToken, ^{
131 self.timerInG = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, dispatch_get_main_queue());
132 dispatch_source_set_timer(self.timerInG, dispatch_walltime(NULL,0 * NSEC_PER_SEC), 0.032 * NSEC_PER_SEC, 0);
133 dispatch_source_set_event_handler(self.timerInG, ^{
134 [self changeImg];
135 });
136 });
137 dispatch_resume(self.timerInG);
138 }
139 else
140 {
141 dispatch_suspend(self.timerInG);
142 }
143 self.gcdTimerResume = !self.gcdTimerResume;
144 }
145
146 - (void)gotoRunloopAction
147 {
148 [self.timerInC invalidate];
149 self.timerInC = nil;
150 [self.timerInN invalidate];
151 self.timerInN = nil;
152 if (self.timerInG) {
153 if (self.gcdTimerResume) {
154 dispatch_resume(self.timerInG);
155 }
156 dispatch_source_cancel(self.timerInG);
157 self.timerInG = nil;
158 }
159 RunloopViewController * vc = [[RunloopViewController alloc] init];
160 [self.navigationController pushViewController:vc animated:YES];
161 }
162 - (void)didReceiveMemoryWarning {
163 [super didReceiveMemoryWarning];
164 // Dispose of any resources that can be recreated.
165 }
166
167 @end
