另外还想请问用array sortedArrayUsingComparator
如何在循环体中写多个判断条件?
比如:NSArray *sortedArray = array sortedArrayUsingComparator:^NSComparisonResult(Student *s1, Student *s2) {
if (s1.score == s2.score) {
// 后面想写用age判断,如果age相等,用name判断
}跪谢了!
如何在循环体中写多个判断条件?
比如:NSArray *sortedArray = array sortedArrayUsingComparator:^NSComparisonResult(Student *s1, Student *s2) {
if (s1.score == s2.score) {
// 后面想写用age判断,如果age相等,用name判断
}跪谢了!
NSSortDescriptor *sortDescriptor1 = [NSSortDescriptor sortDescriptorWithKey:@"_score" ascending:NO];你的第二个问题,你自己不就给出了答案么?
f (s1.score == s2.score) {
// 后面想写用age判断,如果age相等,用name判断
if (s1.age == s2.age) {
//do something
} else {
//do something
}
}else {
// do something
}
NSSortDescriptor *sortDescriptor1 = [NSSortDescriptor sortDescriptorWithKey:@"_score" ascending:NO];
NSSortDescriptor *sortDescriptor2 = [NSSortDescriptor sortDescriptorWithKey:@"_age" ascending:NO];
NSSortDescriptor *sortDescriptor3 = [NSSortDescriptor sortDescriptorWithKey:@"_name" ascending:NO];优先按score降序。 score- > age - > name