xcode arc 下使用 block警告 Capturing [an object] strongly in this block is likely to lead to a retain cycle” in ARC-enabled code

xcode arc 下使用 block警告 Capturing [an object] strongly in this block is likely to lead to a retain cycle” in ARC-enabled code

解决方法：

方法一：

 ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:[NSURL URLWithString:Api]];

    __block ASIHTTPRequest *brRequest = request;

    [request setCompletionBlock:^{
        id json = [NSJSONSerialization JSONObjectWithData:[brRequest responseData] options: error:Nil];
        //NSLog(@"%@",json);
        NSLog(@"completed");

    }];

    [request setFailedBlock:^{
        NSLog(@"%@",[brRequest error]);
    }];

    [request startAsynchronous];

方法2：

//    //方式二
//    __weak ASIHTTPRequest *werRequest = [ASIHTTPRequest requestWithURL:[NSURL URLWithString:api]];
//    [werRequest setCompletionBlock:^{
//        id json = [NSJSONSerialization JSONObjectWithData:[werRequest responseData] options:0 error:Nil];
//        NSLog(@"%@",json);
//
//    }];
//
//    [werRequest setFailedBlock:^{
//        NSLog(@"%@",[werRequest error]);
//    }];
//
//    [werRequest startAsynchronous];

参考：http://stackoverflow.com/questions/7205128/fix-warning-capturing-an-object-strongly-in-this-block-is-likely-to-lead-to-a