简单的秒表定时器

  1 #import "ViewController.h"
  2 
  3 #import "UIView+FrameExtension.h"
  4 
  7 #define kDeviceWidth [UIScreen mainScreen].bounds.size.width
  8 
  9 #define kDeviceHeight [UIScreen mainScreen].bounds.size.height
 10 
 13 @interface ViewController (){
 14 
 15     UILabel *_lbl1;
 16 
 17     UILabel *_lbl2;
 18 
 19     UILabel *_lbl3;
 20 
 21     UILabel *_lbl4;

 25     NSTimer *_timer;
 26 
 27     BOOL    _isRunning;
 28 
 29 }
 33 @end
 34 
 37 @implementation ViewController
 38 
 41 - (void)viewDidLoad {
 42 
 43     [super viewDidLoad];
 44 
 47     [self createLabel];     //创建7个标签
 48 
 49     [self createTimer];     //创建1个定时器
 50 
 51     [self createButton];    //创建3个按
 52 
 53 }
 54 
 57 -(void)createLabel{

 61     UILabel *lbl1 = [[UILabel alloc]initWithFrame:CGRectMake(90, 200, 30, 40)];
 62 
 63     lbl1.text = @"00";
 64 
 65     lbl1.textColor = [UIColor redColor];
 66 
 67     [self.view addSubview:lbl1];
 68 
 69     _lbl1 = lbl1;
 70 
 73     UILabel *lbl11 = [[UILabel alloc]initWithFrame:CGRectMake(lbl1.right, lbl1.y, 10, lbl1.height)];
 74 
 75     lbl11.text = @":";
 76 
 77     lbl11.textColor = [UIColor redColor];
 78 
 79     [self.view addSubview:lbl11];
 80 
 83      UILabel *lbl2 = [[UILabel alloc]initWithFrame:CGRectMake(lbl11.right, lbl1.y, lbl1.width, lbl1.height)];
 84 
 85     lbl2.text = @"00";
 86 
 87     lbl2.textColor = [UIColor redColor];
 88 
 89     [self.view addSubview:lbl2];
 90 
 91     _lbl2 = lbl2;
 92 
 95     UILabel *lbl22 = [[UILabel alloc]initWithFrame:CGRectMake(lbl2.right, lbl1.y, lbl11.width, lbl1.height)];
 96 
 97     lbl22.text = @":";
 98 
 99     lbl22.textColor = [UIColor redColor];
100 
101     [self.view addSubview:lbl22];
102 
103     UILabel *lbl3 = [[UILabel alloc]initWithFrame:CGRectMake(lbl22.right, lbl1.y, lbl1.width, lbl1.height)];
104 
105     lbl3.text = @"00";
106 
107     lbl3.textColor = [UIColor redColor];
108 
109     [self.view addSubview:lbl3];
110 
111     _lbl3 = lbl3;
112 
115     UILabel *lbl33 = [[UILabel alloc]initWithFrame:CGRectMake(lbl3.right, lbl1.y, lbl11.width, lbl1.height)];
116 
117     lbl33.text = @".";
118 
119     lbl33.textColor = [UIColor redColor];
120 
121     [self.view addSubview:lbl33]; 
122 
123     UILabel *lbl4 = [[UILabel alloc]initWithFrame:CGRectMake(lbl33.right, lbl1.y, lbl1.width, lbl1.height)];
124 
125     lbl4.text = @"00";
126 
127     lbl4.textColor = [UIColor redColor];
128 
129     [self.view addSubview:lbl4];
130 
131     _lbl4 = lbl4;
132 
137 }

141 -(void)createButton{
142  
146 
147     UIButton *btn1 = [[UIButton alloc]initWithFrame:CGRectMake(70, _lbl1.bottom+20, 60, 40)];
148 
149     [btn1 setTitle:@"开始" forState:UIControlStateNormal];
150 
151     [self.view addSubview:btn1];
152 
153     [btn1 setBackgroundImage:[UIImage imageNamed:@"logoff_btn_s"] forState:UIControlStateNormal];
154 
155     [btn1 setBackgroundImage:[UIImage imageNamed:@"submit_discussion_n"] forState:UIControlStateHighlighted];
156 
157     [btn1 addTarget:self action:@selector(start ) forControlEvents:UIControlEventTouchUpInside];
158 
163     UIButton *btn2 = [[UIButton alloc]initWithFrame:CGRectMake(btn1.right+10, btn1.y, btn1.width, btn1.height)];
164 
165     [btn2 setTitle:@"停止" forState:UIControlStateNormal];
166 
167     [self.view addSubview:btn2];
168 
169     [btn2 setBackgroundImage:[UIImage imageNamed:@"logoff_btn_s"] forState:UIControlStateNormal];
170 
171     [btn2 setBackgroundImage:[UIImage imageNamed:@"submit_discussion_n"] forState:UIControlStateHighlighted];
172 
173     [btn2 addTarget:self action:@selector(stop ) forControlEvents:UIControlEventTouchUpInside];
174 
179     UIButton *btn3 = [[UIButton alloc]initWithFrame:CGRectMake(btn2.right+10,btn1.y , btn1.width, btn1.height)];
180 
181     [btn3 setTitle:@"复位" forState:UIControlStateNormal];
182 
183     [self.view addSubview:btn3];
184 
185     [btn3 setBackgroundImage:[UIImage imageNamed:@"logoff_btn_s"] forState:UIControlStateNormal];
186 
187     [btn3 setBackgroundImage:[UIImage imageNamed:@"submit_discussion_n"] forState:UIControlStateHighlighted];
188 
189     [btn3 addTarget:self action:@selector(fuwei ) forControlEvents:UIControlEventTouchUpInside];
190 
191 }
192 
195 -(void)start{

199     [[NSRunLoop mainRunLoop] addTimer:_timer forMode:NSRunLoopCommonModes];
200 
201     _isRunning = YES;
202   
204 
205     if (_isRunning) {       //表示定时器正在运行
206 
207         [_timer setFireDate:[NSDate distantPast]];
208 
211     }else{
212 
213         [_timer setFireDate:[NSDate distantFuture]];
214 
215     }
216 
217 }
218 
221 -(void)stop{
222 
225     _isRunning = !_isRunning;
226 
229     if (_isRunning) {       // 表示定时器正在运行
230 
233     }else{
234 
235         [_timer setFireDate:[NSDate distantFuture]];
236 
237     }
238 
239     _isRunning = NO;
240 
241 }
242 
245 -(void)fuwei{
246 
251         NSString* str4 = _lbl4.text;
252 
253         NSString* str3 = _lbl3.text;
254 
255         NSString* str2 = _lbl2.text;
256 
257         NSString* str1 = _lbl1.text;
258 
261         int x4 = [str4 intValue];
262 
263         int x3 = [str3 intValue];
264 
265         int x2 = [str2 intValue];
266 
267         int x1 = [str1 intValue];
268 
271         x4 = x3 = x2 = x1 = 0;
272 
275         NSString* str44 = [NSString stringWithFormat:@"%02d",x4];
276 
277         NSString* str33 = [NSString stringWithFormat:@"%02d",x3];
278 
279         NSString* str22 = [NSString stringWithFormat:@"%02d",x2];
280 
281         NSString* str11 = [NSString stringWithFormat:@"%02d",x1];
282 
283         _lbl4.text = str44;
284 
285         _lbl3.text = str33;
286 
287         _lbl2.text = str22;
288 
289         _lbl1.text = str11;
290 
293     _isRunning = !_isRunning;
294 
297     if (_isRunning) {       // 表示定时器正在运行
298 

301     }else{
302 
303         [_timer setFireDate:[NSDate distantFuture]];
304 
305     }
306 
307     _isRunning = NO;
308 

311 }
312 

315 -(void)createTimer{

319     _timer = [NSTimer timerWithTimeInterval:0.01 target:self selector:@selector(move ) userInfo:nil repeats:YES];
320 
323     _isRunning = NO;
324 
327     //     下面这种方法创建的定时器，会自动的加入运行循环
328 
329     //    _timer = [NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(move) userInfo:nil repeats:YES];
330 
331 }
332 
334 
335 -(void)move{
336 
339      NSString* str4 = _lbl4.text;
340 
341      NSString* str3 = _lbl3.text;
342 
343      NSString* str2 = _lbl2.text;
344 
345      NSString* str1 = _lbl1.text;
346 
349     int x4 = [str4 intValue];
350 
351     int x3 = [str3 intValue];
352 
353     int x2 = [str2 intValue];
354 
355     int x1 = [str1 intValue];
356 
359     x4++;
360 
363     if (x4 == 100 ) {
364 
365         x3 = x3 + 1;
366 
367         x4 = 0;
368 
369         if (x3 == 60) {
370 
371             x2 = x2 + 1;
372 
373             x3 = 0;
374 
375             if (x2 == 60 ) {
376 
377                 x1 = x1 + 1;
378 
379                 x2 = 0;
380 
381                 if (x1 == 24 ) {
382 
383                     x4 = x3 = x2 = x1 = 0;
384 
385                 }
386 
387             }
388 
389         }
390 
391     }
392    
394 
395     NSString* str44 = [NSString stringWithFormat:@"%02d",x4];
396 
397     NSString* str33 = [NSString stringWithFormat:@"%02d",x3];
398 
399     NSString* str22 = [NSString stringWithFormat:@"%02d",x2];
400 
401     NSString* str11 = [NSString stringWithFormat:@"%02d",x1];
402 
403     _lbl4.text = str44;
404 
405     _lbl3.text = str33;
406 
407     _lbl2.text = str22;
408 
409     _lbl1.text = str11;   
410 
411 }
412 
413  @end