标签:UI 文件上传 method http cas pos events str imageview
使用原生态的api上传文件的实现:
#import "MainViewController.h" @interface MainViewController () @property (weak, nonatomic) UIImageView *imageView; @end @implementation MainViewController - (void)viewDidLoad { [super viewDidLoad]; //定义Imageview并设置图像 UIImage *image = [UIImage imageNamed:@"头像1.png"]; UIImageView *imageView = [[UIImageView alloc]initWithImage:image]; [imageView setFrame:CGRectMake(60, 20, 200, 200)]; [self.view addSubview:imageView]; self.imageView = imageView; UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect]; [button setFrame:CGRectMake(60, 240, 200, 40)]; [button setTitle:@"upload" forState:UIControlStateNormal]; [self.view addSubview:button]; [button addTarget:self action:@selector(uploadImage) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:button]; } #pragma mark 上传文件(图像) - (void)uploadImage { NSLog(@"upload"); //思路: 须要使用http的post方法上传文件 //调用的url是http://localhost/~apple/itcast/upload.php //数据体的參数名:file //1建立URL NSURL *url = [NSURL URLWithString:@"http://localhost/~apple/itcast/upload.php"]; //2建立NSMutableRequest NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url]; //1)设置request的属性。设置方法 [request setHTTPMethod:@"POST"]; //2)设置数据体 //1> 设置boundary的字符串,能够复用 NSString *boundary = @"uploadBoundary"; //2>头部字符串 NSMutableString *startStr = [NSMutableString string]; [startStr appendFormat:@"--%@\n", boundary]; [startStr appendString:@"Content-Disposition: form-data; name=\"file\"; filename=\"upload.png\"\n"]; [startStr appendString:@"Content-Type: image/png\n\n"]; //3>尾部字符串 NSMutableString *endStr = [NSMutableString string]; [endStr appendFormat:@"--%@\n", boundary]; [endStr appendString:@"Content-Disposition: form-data: name=\"submit\"\n\n"]; [endStr appendString:@"Submit\n"]; [endStr appendFormat:@"--%@--", boundary]; //4>拼接数据体 NSMutableData *bodyData = [NSMutableData data]; [bodyData appendData:[startStr dataUsingEncoding:NSUTF8StringEncoding]]; NSData *imageData = UIImagePNGRepresentation(self.imageView.image); [bodyData appendData:imageData]; [bodyData appendData:[endStr dataUsingEncoding:NSUTF8StringEncoding]]; [request setHTTPBody:bodyData]; //5>指定Content-Type,在上传文件时,须要指定content-type和content-length NSString *contentStr = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary]; [request setValue:contentStr forKey:@"Content-Type"]; //6>指定Content-Length NSInteger length = [bodyData length]; [request setValue:[NSString stringWithFormat:@"%d", length] forKey:@"Content-Length"]; //3使用NSURLConnection的同步方法上传文件。由于须要用户确认文件是否上传成功。//在使用http上传文件时,一般是有限制大小的。一般不会超过2M. NSURLResponse *response = nil; NSError *error = nil; NSData *resultData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error]; NSString *resultStr = [[NSString alloc]initWithData:resultData encoding:NSUTF8StringEncoding]; NSLog(@"%@", resultStr); } @end
标签:UI 文件上传 method http cas pos events str imageview
原文地址:http://www.cnblogs.com/yfceshi/p/7257630.html