Question

这是我的回复

1.{

    image = nbYijSxVXDOFGWFk8BhZUpU
    "is_food_in_time_product" = 1;
    "list_price" = "2.8";
    name = Export;

}
2.
{

    image = 0;
    "is_food_in_time_product" = 1;
    "list_price" = 1;
    name = "K\U00e4se";

}

NSString *abc5 = [abc4 valueForKey:@"image"];
NSLog(@"%@",abc5);

这里第一个响应图像即将到来的数据，第二个响应图像没有数据。然后如何写if条件。

Answer 1

NSNumber * isSuccessNumber = (NSNumber *)[abc4 valueForKey:@"image"];
if([isSuccessNumber boolValue] == YES)
{
  NSLog(@"Image is available");
} else {
  NSLog(@"Image is not available");
}

你的回答是这样的

第一个条件：

 NSDictionary *r1 = @{@"bool" : @(1)};

NSNumber * isSuccessNumber = (NSNumber *)[r1 valueForKey:@"bool"];
if([isSuccessNumber boolValue] == YES)
{
    NSLog(@"Image is available");
} else {
    NSLog(@"Image is not available");
}

<强>输出1

图片可用

第二个条件：

NSDictionary *r1 = @{@"bool" : @(0)};

NSNumber * isSuccessNumber = (NSNumber *)[r1 valueForKey:@"bool"];
if([isSuccessNumber boolValue] == YES)
{
    NSLog(@"Image is available");
} else {
    NSLog(@"Image is not available");
}

<强>输出2

图片不可用

Answer 2

根据网址，你必须这样做：

    NSDictionary *responseDataDictionary = responseObject;
    //here responce object is your total data which is coming from server
    NSArray *array = [[responseDataDictionary valueForKey:@"result"] valueForKey:@"products"];
          for (NSDictionary *dict in array)
          {
               NSString *str = [dict valueForKey:@"image"];
               if([str isKindOfClass:[NSString class]])
               {
                    NSLog(@"YES");
                    //here you have to add your image as usual to another mutable array
               }else{
                    NSLog(@"NO");
                    // bool value happens means this will execute
                    // Here you have to add custom image ie.placeholder image
               }

          }
    }

欢呼

Answer 3

您存储的Dictionary内Array。

//Here index is an integer value, showing the index of an array responseArray.
if[responseArray[index][@"image"] intValue]!=0){

    //Load image
}else{
    //Do not load image
}

Answer 4

您需要检查图像（数据）是否为零

首先你可以直接检查

if(abc5 length] == 0)
{
   ....
}
else
{
  ....
}

然后将图像（数据）转换为字符串（abc5）

09/29 13:54:36: Launching app
$ adb push /Users/user/AndroidStudioProjects/MyApplication/app/build/outputs/apk/app-debug.apk /data/local/tmp/com.example.user.myapplication
$ adb shell pm install -r "/data/local/tmp/com.example.user.myapplication"
Aborted 


$ adb shell am start -n "com.example.user.myapplication/com.example.user.myapplication.MainActivity" -a android.intent.action.MAIN -c android.intent.category.LAUNCHER
Error while executing: am start -n "com.example.user.myapplication/com.example.user.myapplication.MainActivity" -a android.intent.action.MAIN -c android.intent.category.LAUNCHER
Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] cmp=com.example.user.myapplication/.MainActivity }
Error type 3
Error: Activity class {com.example.user.myapplication/com.example.user.myapplication.MainActivity} does not exist.

Error while Launching activity

如何写入BOOL值的条件

4 个答案: