8-2作业的问题

在绘图的界面遇到问题，    //数据调用  的部分总有报错，不知道怎么解决。如果把调用数据和绘图的部分都注释掉，是可以正常进如绘图的界面，

#import "graphicViewController.h"

@interface graphicViewController ()

@end

@implementation graphicViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    UIView * backgroundview=[[UIView alloc]initWithFrame:self.view.bounds];

    backgroundview.backgroundColor=COLOR001;

    [self.view addSubview:backgroundview];

    //创建返回按钮

   UIButton * returnbutton =[[UIButton alloc]initWithFrame:CGRectMake(self.view.bounds.size.width/2-40, self.view.bounds.size.height-70, 80, 40)];

    returnbutton.backgroundColor=[UIColor colorWithRed:0.9 green:0.5 blue:0.3 alpha:1.0];

    [returnbutton setTitle:@"返回" forState:UIControlStateNormal];

    [returnbutton addTarget:self action:@selector(returnAction) forControlEvents:UIControlEventTouchDown];

    [self.view addSubview:returnbutton];

    //数据调用

    NSMutableArray * array1=[self loadGraphicData];

    NSMutableArray * array2 =[self parseGraphicData:array1];

//    NSMutableArray * newData=[self nomarlizingData:array2];

////绘制图形

//    Quartz * quartz =[[Quartz alloc]initWithFrame:self.view.bounds graphicData2:newData];

//    [self.view addSubview:quartz];

//    [quartz setNeedsDisplay];

}

//数据加载

-(NSMutableArray*)loadGraphicData{

    NSString *filepath =[[NSBundle mainBundle]pathForResource:@"1" ofType:@"txt"];

    NSData *data =[NSData dataWithContentsOfFile:filepath];

    NSString * graphicdatastr=[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];

    NSMutableArray * array=[[NSMutableArray alloc]initWithArray:[graphicdatastr componentsSeparatedByString:@"\n"]];

    return array;

}

//数据分析

-(NSMutableArray*)parseGraphicData:(NSMutableArray*)graphicData1{

    NSMutableArray* graphicArray=[[NSMutableArray alloc]init];

    //使用for循环，把每一个数据拿出来

    for (int i=0;i<graphicData1.count;i++){

        NSString *str=[graphicData1 objectAtIndex:i];

        NSMutableArray * onegraphic =[[NSMutableArray alloc]initWithArray:[str componentsSeparatedByString:@" "]];

        NSString * time1 = [onegraphic objectAtIndex:0];

        NSString * level1 =[onegraphic objectAtIndex:1];

        graphicData * onegraphicdata=[[graphicData alloc]init];

        onegraphicdata.time=time1.floatValue;

        onegraphicdata.waterlevel = level1.intValue;

        [graphicArray addObject:onegraphicdata];

    }

    return graphicArray;

}

//数据归一化，把0-100的水位变成0-300之间的数字

-(NSMutableArray * )nomarlizingData:(NSMutableArray*)graphicData4{

    NSMutableArray * newData=[[NSMutableArray alloc]init];

    for(graphicData *item in graphicData4){

        item.waterlevel = item.waterlevel*3;

        [newData addObject:item];

    }

    return newData;

}

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

-(void)returnAction{

    [self dismissViewControllerAnimated:YES completion:nil];

}

@end