? ? ? ? ?做一朵白蓮花吧，在物欲橫流的社會底層靜靜發育，不沾染一點灰塵，慢慢伸出理想的枝干，穿越爾虞我詐的茂密荷葉，在瀲滟的水面上開出潔白的花瓣，笑對陽光，笑對夢雨，笑對秋風，笑對看客，然后結成一個純凈的心靈蓮蓬，在里面珍藏潔白如玉的理想蓮子。 ?
? ? ? ? ?之所以，寫這篇文章，是本菜鳥覺得獲取驗證碼倒計時這個知識點貌似、大概、也許，每個App基本上都會遇到的，為了不再寫那么都煩躁的代碼，所有上來與大家共勉一下，希望大家多多指教。又因為最近項目遇到支付倒計時，所有也把這個方法做了修改一起分享出來。
------------------------------使用方法------------------------------------
一：最常見的：注冊、忘記密碼的時候獲取驗證碼倒計時
二：支付過程支付時間倒計時、商城活動倒計時
------------------------------.h------------------------------------
#import
@interfaceCountDown :NSObject
///支付過程倒計時商城倒計時
-(void)countDownWithSeparate:(NSInteger)totalTime completeBlock:(void(^)(NSIntegerday,NSIntegerhour,NSIntegerminute,NSIntegersecond))completeBlock;
///獲取驗證碼倒計時
-(void)countDownWithTime:(NSInteger)totalTime completeBlock:(void(^)(NSIntegercountDown))completeBlock;
///主動銷毀定時器
-(void)destoryTimer;
@end
------------------------------.m------------------------------------
#import"CountDown.h"
@interfaceCountDown()
@property(nonatomic,retain)dispatch_source_ttimer;
@end
@implementationCountDown
#pragma mark支付過程倒計時 ? ?商城倒計時
-(void)countDownWithSeparate:(NSInteger)totalTime completeBlock:(void(^)(NSIntegerday,NSIntegerhour,NSIntegerminute,NSIntegersecond))completeBlock{
if(_timer==nil) {
__blockNSIntegertimeout = totalTime;
if(timeout !=0) {
dispatch_queue_tqueue =dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT,0);
_timer=dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER,0,0,queue);
dispatch_source_set_timer(_timer,dispatch_walltime(NULL,0),1.0*NSEC_PER_SEC,0);
dispatch_source_set_event_handler(_timer, ^{
if(timeout <=0){
dispatch_source_cancel(_timer);
_timer=nil;
dispatch_async(dispatch_get_main_queue(), ^{
completeBlock(0,0,0,0);
});
}else{
NSIntegertotalTime = timeout;
NSIntegers =1;
NSIntegerm = s *60;
NSIntegerh = m *60;
NSIntegerd = h *24;
NSIntegerday = totalTime / d;//天
NSIntegerhour = (totalTime - day * d) / h;//時考慮天1天23小時59分鐘59秒
//NSInteger onlyhour = totalTime / h;//時不考慮天只考慮到小時28小時59分鐘59秒
NSIntegerminute = (totalTime - day * d - hour * h) / m;//分
NSIntegersecond = (totalTime - day * d - hour * h - minute * m) / s;//秒
dispatch_async(dispatch_get_main_queue(), ^{
completeBlock(day,hour,minute,second);
});
//不考慮天的回調28小時59分鐘59秒
//dispatch_async(dispatch_get_main_queue(), ^{
//completeBlock(0,onlyhour,minute,second);
//});
timeout--;
}
});
dispatch_resume(_timer);
}
}
}
#pragma mark獲取驗證碼倒計時
-(void)countDownWithTime:(NSInteger)totalTime completeBlock:(void(^)(NSIntegercountDown))completeBlock
{
if(_timer==nil) {
__blockNSIntegertimeout = totalTime;
if(timeout !=0) {
dispatch_queue_tqueue =dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT,0);
_timer=dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER,0,0,queue);
dispatch_source_set_timer(_timer,dispatch_walltime(NULL,0),1.0*NSEC_PER_SEC,0);
dispatch_source_set_event_handler(_timer, ^{
if(timeout <=0){
dispatch_source_cancel(_timer);
_timer=nil;
dispatch_async(dispatch_get_main_queue(), ^{
completeBlock(0);
});
}else{
dispatch_async(dispatch_get_main_queue(), ^{
completeBlock(timeout);
});
timeout--;
}
});
dispatch_resume(_timer);
}
}
}
#pragma mark主動銷毀定時器
-(void)destoryTimer
{
if(_timer){
dispatch_source_cancel(_timer);
_timer=nil;
}
}
@end
