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目前,我有下面的代碼顯示倒計時的具體日期:如何顯示000:00:00:00格式的NSDate倒計時?
NSDate *date=[NSDate date];
int secondsNow=(int)[date timeIntervalSince1970];
NSDateFormatter *formatter=[[NSDateFormatter alloc] init];
[formatter setDateFormat:@"yyyy"];
NSString *LaunchBegin=[NSString stringWithFormat:@"20120126"]; // ENTER THE DATE OF LAUNCH HERE IN FORMAT YYYYMMDD
[formatter setDateFormat:@"yyyyMMdd"];
NSDate *otherDate=[formatter dateFromString:LaunchBegin];
int secondsTarget=(int)[otherDate timeIntervalSince1970];
int differenceSeconds=secondsTarget-secondsNow;
int days=(int)((double)differenceSeconds/(3600.0*24.00));
int diffDay=differenceSeconds-(days*3600*24);
int hours=(int)((double)diffDay/3600.00);
int diffMin=diffDay-(hours*3600);
int minutes=(int)(diffMin/60.0);
int seconds=diffMin-(minutes*60);
CountdownLabel.text=[NSString stringWithFormat:@"%d:%d:%d:%d",days,hours,minutes,seconds]; // This is what I want to change to 000:00:00:00
NSTimer *timer;
timer = [NSTimer scheduledTimerWithTimeInterval: 0.8
target: self
selector: @selector(updateTimeToLaunch)
userInfo: nil
repeats: NO];
if(days <= 0 && hours <= 0 && minutes <= 0 && seconds <= 0)
{
UIImage *image = [UIImage imageNamed: @"end_countdown_highres.png"];
[backing setImage:image];
[facebook setHidden:NO];
[twitter setHidden:NO];
}
我怎樣才能使一個「000:00:00:00」的輸出格式,而不是目前的「0:0 :0:0「格式?
由於Skippy指出,printf規範中的前導零表示應該使用零填充而不是空格使用零填充。非零數字表示字段的總寬度。 printf規範在多個地方在網絡上,你應該熟悉它。 –