NSData类方法的同步请求、NSString类方法的同步请求

来源：互联网发布：fastjson map转json 编辑：程序博客网时间：2024/06/05 15:50
#import "ViewController.h"@interface ViewController ()@property(nonatomic,weak)IBOutlet UIButton *button;@property(nonatomic,weak)IBOutlet UIImageView *imageView;@end@implementation ViewController-(IBAction)btnClick:(id)sender{    //给一个url字符串    NSString *str = @"http://iappfree.candou.com:8080/free/applications/limited?currency=rmb&page=3";    NSString *str2 = @"http://photo.candou.com/i/114/826ea823e8ffe792a6fda9e126f6c404";    //封装成可用的URL类型;    NSURL *url = [NSURL URLWithString:str];    NSURL *url2 = [NSURL URLWithString:str2];        [self syncDownloadWithString:url];    [self syncDownloadWithData:url2];}#pragma mark -NSData类方法的同步请求--(void)syncDownloadWithData:(NSURL *)url{    //二进制数据提供的同步请求方法    NSData *data = [NSData dataWithContentsOfURL:url];        //NSData -->UIImage    UIImage *image = [UIImage imageWithData:data];        //UIImage -->NSData    NSData *dataImage = UIImagePNGRepresentation(image);    NSData *dataImage2 = UIImageJPEGRepresentation(image, 0.5);            UIImage *image3 = [UIImage imageWithContentsOfFile:@""];        self.imageView.image = image;        NSLog(@"下载完毕");}-(void)synDownloadWithString1:(NSURL *)url{    NSError *error;    NSString *str = [[NSString alloc]initWithContentsOfURL:url encoding:NSUTF8StringEncoding error:&error];        if (error) {        NSLog(@"%@",error);    }        }#pragma mark -NSString类方法的同步请求--(void)syncDownloadWithString:(NSURL *)url{    //字符串提供的同步请求的方法    NSError *error;    NSString *str = [[NSString alloc]initWithContentsOfURL:url encoding:NSUTF8StringEncoding error:&error];    if (error) {        NSLog(@"%@",error);        return;    }    //NSString --->NSData;    NSData *data = [str dataUsingEncoding:NSUTF8StringEncoding];        //NSDate -->NSString    NSString *strData = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];    NSLog(@"%@",strData);        NSDictionary * dict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];    NSLog(@"%@",dict);            NSLog(@"str:%@",str);}- (void)viewDidLoad {    [super viewDidLoad];        // Do any additional setup after loading the view, typically from a nib.}- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}@end
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