Objective - C的连接测试警告

我有以下代码：Objective - C的连接测试警告

//View guest list 
-(IBAction) guestList:(id) sender{ 
    NSString *connected = [NSString stringWithContentsOfURL:[NSURL URLWithString:@"myURL"]]; 

    //Waits a set peroid of time 
    wait(20000); 

    //Guest list is availible 
    if (connected != NULL){ 
     CHARLIEAppDelegate *appDelegate = [[UIApplication sharedApplication] delegate]; 
     [appDelegate displayView:6]; 
    } 
    //No network connection availible 
    else { 
     UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"No Network Connection!" message:@"Cannot establish internet connection." delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil]; 
     [alert show]; 
     [alert release]; 
    } 

}

而且我得到以下警告：

//Waits a set peroid of time 
    wait(20000);

给我 - 警告：传递的参数1 '等待' 品牌从整数指针不进行强制转换

NSString *connected = [NSString stringWithContentsOfURL:[NSURL URLWithString:@"http://photostiubhart.comoj.com/testconnection.php"]];

给我 -

警告： 'stringWithContentsOfURL：' 被弃用（在/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.3.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSString.h声明：384）

我做了我的测试和代码SEEMS工作正常，即使有这些警告。有没有办法根本去除这些警告？或者他们不重要？

我使用的Xcode 3.2.6以上版本

感谢，

杰克

来源

2011-06-11 Jack Nutkins

不要使用'等待（）'或'睡眠（）'或朋友。这无意中阻塞了主线程。只需使用内置的连接方法即可。 – 2011-06-11 12:21:01

使用

NSError* error; 
NSString* connected = [NSString stringWithContentsOfURL:TheUrl encoding:NSASCIIStringEncoding error:&error];

来源

2011-06-11 12:17:02 Rams

您应该使用方法 -

+(id)stringWithContentsOfURL:(NSURL *)url encoding:(NSStringEncoding)enc error:(NSError **)error

为例子 -

NSString* text = [NSString stringWithContentsOfURL:TheUrl encoding:NSASCIIStringEncoding error:&error];

希望它能帮助你。

来源

2011-06-11 12:17:10

尝试做这种方式：

-(IBAction)guestList:(id) sender{ 
    NSURL *requestUrl = [NSURL URLWithString:@"http://photostiubhart.comoj.com/testconnection.php"]; 
    NSURLRequest *requestObj = [NSURLRequest requestWithURL:requestUrl]; 
    NSData *loadTest = [NSData dataWithContentsOfURL:requestUrl]; 

    if (loadTest == nil) { 
     UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"No Network Connection!" message:@"Cannot establish internet connection." delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil]; 
     [alert show]; 
     [alert release]; 
    } else { 
     CHARLIEAppDelegate *appDelegate = [[UIApplication sharedApplication] delegate]; 
     [appDelegate displayView:6]; 
    } 
}

来源

2011-06-11 12:25:34

Objective - C的连接测试警告

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