根据年月日计算星期几。
代码块
、、、
NSInteger year = _dataArray[0][yearIndex].integerValue;
NSInteger mouth = _dataArray[1][monthIndex].integerValue;
NSInteger day = _dataArray[2][dayIndex].integerValue;
NSInteger c = year/100;
NSInteger y = year%100;
NSInteger m = mouth;
if (m < 3) {
m +=12;
y -=1;
}
NSInteger week = c/4 - 2*c + y + y/4 + 13*(m+1)/5 + day - 1;
NSInteger weekIndex = week%7;
NSLog(@"星期 %ld ",weekIndex);
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