如何檢查NSMutableArray的實例是否爲空

Question

如何檢查NSMutableArray是否爲空？

Answer 1

如果你想檢查它是否是空的：

if ([myMutableArray count] == 0) { ... } 

如果你想檢查變量nil：

if (!myMutableArray) { ... } 

或：

if (myMutableArray == nil) { ... } 

Answer 2

//if the array has a count of elements greater than 0, then the array contains elements 
if(myarray.count>0){ 
    NSlog(@"myarray contains values/elements"); 
} 
else{ //else the array has no elements 
    NSlog(@"myarray is nil"); 
} 

Answer 3

有多種方法可以檢查它。

1.  
   if (array == [NSNull null]) 
   { 
       //myarray is blank 
   } 
   

2.  
   if(array.count==0) 
   { 
       //myarray is blank 
   } 
   

3.  
   if(array == nil) 
   { 
       //my array is blank 
   } 
   

Answer 4

您可以檢查此方式也...

if self.yourMutableArray.count == 0 { 
    // Your Mutable array is empty. 
} else { 
    // Your Mutable array is not empty. 
}