摘要：
NSSortDescriptor *classWithSort=[[NSSortDescriptor alloc]initWithKey:@"class" ascending:YES]; NSSortDescriptor *ageWithSort=[[NSSortDescriptor allo... 阅读全文
摘要：
NSDictionary *dic1=@{@"name":@"white",@"age":@"14",@"gender":@"F"}; NSDictionary *dic2=@{@"name":@"mary",@"age":@"12",@"gender":@"M"}; NSDiction... 阅读全文
摘要：
NSDictionary *dic=@{@"1-1":@"02",@"1-2":@"33",@"1-3":@"44",@"1-4":@"60"};NSArray *arr=[dic allValues];arr=[arr sortedArrayUsingComparator:^NSCompariso... 阅读全文
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#if DEBUG#define NSLog(FORMAT, ...) fprintf(stderr,"%s\n",[[NSString stringWithFormat:FORMAT, ##__VA_ARGS__] UTF8String]);#else#define NSLog(FORMAT, .... 阅读全文
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NSMutableDictionary *mutdic=[[NSMutableDictionary alloc]initWithObjectsAndKeys:@"Jay",@"name",@"22",@"age",@"F",@"gender",nil]; //添加 NSDictionar... 阅读全文
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//遍历 //1.先找到所有key； //2.计算key的个数，用于循环 //3.通过key的数组，找到key对应的value NSArray *keyss=[nulldic allKeys]; NSInteger count=[keyss count]; for... 阅读全文
摘要：
//字典的创建 NSNumber *num=[NSNumber numberWithInt:100]; NSDictionary *dic=[NSDictionary dictionaryWithObject:num forKey:@"money"]; NSDictionar... 阅读全文