objective-c - setCompletionBlock 中的 AFNetworking EXC_BAD_ACCESS

Question

我正在开发一个 iOS 应用程序，但在使用 AFNetworking 发出 http 请求时遇到了一些问题。

当我运行代码时，我收到错误:EXC_BAD_ACCESS(code=2 address=0x0)。
当我尝试 setCompletionBlock 时发生错误。

我是 Objective-C 的新手，这让我很困惑。

先感谢您。感谢大家的帮助!

#import "AFNetworking.h"
#import <Cordova/CDV.h>
#import "UploadImg.h"

@implementation UploadImg

- (void) uploadImg:(NSMutableArray*)arguments withDict:(NSMutableDictionary*)options{
    NSURL *url = [NSURL URLWithString:@"http://test.com/mobile/"];
    AFHTTPClient *httpClient = [[AFHTTPClient alloc] initWithBaseURL:url];

    NSData *imageData = [NSData dataFromBase64String:[arguments objectAtIndex:1]];

    NSMutableDictionary *params = [[NSMutableDictionary alloc] init];
    [params setObject:@"TEST_STYLE" forKey:@"styleType"];

    NSMutableURLRequest *request = [httpClient multipartFormRequestWithMethod:@"POST" path:@"/upload.php" parameters:params constructingBodyWithBlock: ^(id <AFMultipartFormData>formData) {
        [formData appendPartWithFileData:imageData name:@"imageName" fileName:@"image.png" mimeType:@"image/png"];
    }];

    AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc]initWithRequest:request];

    [operation  setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
        NSLog(@"success");
    } 
    failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"error");
    }];

    [operation start];
}

@end

再次感谢!

Answer 1

我能够通过更改build设置来解决这个问题。

在链接标题下更改“其他链接器标志”，单击 -weak_library 条目并将其替换为 -weak-lSystem

来自问题:Use of Blocks crashes app in iPhone Simulator 4.3/XCode 4.2 and 4.0.2