数组排序

//数组内元素排序

NSArray *arr=@[@"b",@"c",@"a",@"t",@"f",@"h",@"m"];

NSArray *sortarr=[arr sortedArrayUsingSelector:@selector(compare:)];//从小到大排序

for (id str in sortarr) {

NSLog(@"%@",str);

}

//数组排序 - -block

NSComparator sortBlock=^(id obj1,id obj2)

{

return [obj1 compare:obj2];

};

NSArray *sortArray=[arr sortedArrayUsingComparator:sortBlock];

for (id str1 in sortArray) {

NSLog(@"%@",str1);

}

}