iOS给model排序

今天有朋友问我怎么给Model排序,我顺便写了一个例子,

以下是代码,很简洁可以直接用.

Person *per = [[Person alloc] init];

per.name = @"z";

per.age = 89;

Person *per1 = [[Person alloc] init];
per1.name = @"h";
per1.age = 18;

Person *per2 = [[Person alloc] init];
per2.name = @"l";
per2.age = 44;

NSMutableArray *array = [NSMutableArray array];
[array addObject:per];
[array addObject:per1];
[array addObject:per2];

NSArray *resultArray = [array sortedArrayUsingComparator:^NSComparisonResult(id obj1, id obj2) {

    Person *per1 = obj1;
    Person *per2 = obj2;

    if (per1.age > per2.age) {

        return NSOrderedDescending;//降序
    }else if (per1.age < per2.age)
    {
        return NSOrderedAscending;//升序
    }else
    {
        return NSOrderedSame;//相等
    }

}];

for (Person *per in resultArray) {
    NSLog(@"per.age = %ld",per.age);
}

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