- Foundation自带类排序
NSArray *arr = @[@(1), @(9), @(5), @(2)];
NSArray *newArr = [arr sortedArrayUsingSelector:@selector(compare:)];
- 自定义类排序
NSArray *arr = @[p1, p2, p3, p4, p5];
// 默认按照升序排序
NSArray *newArr = [arr sortedArrayWithOptions:NSSortConcurrent usingComparator:^NSComparisonResult(Person *obj1, Person *obj2) {
return obj1.age > obj2.age;
}];
NSLog(@"%@", newArr);
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