【开发笔记】过滤数组中相同的元素

实战例子：过滤数组中相同的元素

文本复制:

//过滤相同的好友请求--LQ注释

-(NSMutableArray*)arrayWithOnly:(NSMutableArray*)arr{

NSMutableArray*array = [NSMutableArrayarray];

for (ApplyEntity *modelin arr) {

[array addObject:model.receiverUsername];

}

NSMutableArray*categoryArr = [NSMutableArrayarray];

for (inti =0; i

if ([arraycontainsObject:[arrayobjectAtIndex:i]]==NO) {

[categoryArraddObject:[arrobjectAtIndex:i]];

}

}

return categoryArr;

}