如何檢查NSString是否包含URL或字符串數​​據？

Question

我更新鮮的iOS，我在檢查字符串對象包含URL或字符串時出現問題？

NSMutableArray *Arr=[NSMutableArray alloc]initWithObject:@"Welcome", @"http://abcd.com/Images/bus.png", nil]; 

int i; 

i++; 

NSString *str=[Arr objectAtIndex:i]; 

現在，我要檢查的條件，如果字符串包含「歡迎光臨」，必須顯示標籤上，或者是URL，我需要的ImageView來顯示URL圖像。那我怎麼檢查它？請幫我解決這個問題。

Answer 1

相反發起既作爲NSString的的，試圖通過它們之間的區別使URL成爲NSURL（專門用於URL的特殊容器）：

NSMutableArray* Arr = [NSMutableArray alloc]initWithObject:@"Welcome", [NSURL URLWithString:@"http://abcd.com/Images/bus.png"], nil]; 

for(id object in Arr) 
{ 
    if([object isKindOfClass:[NSString class]]) 
    { 
     NSString* string = object; 
     NSLog(@"String: %@", string); 
    } 
    else if([object isKindOfClass:[NSURL class]]) 
    { 
     NSURL* url = object; 
     NSLog(@"URL: %@", url); 
    } 
} 

Answer 2

要檢查NSString被包含URL你可以試試這個代碼

if ([stringName hasPrefix:@"http://"] || [stringName hasPrefix:@"https://"]) { 
    //show imageVivew 
} 

Answer 3

試試這個，它會幫助你：

NSMutableArray *Arr=[[NSMutableArray alloc]initWithObjects:@"Welcome", @"http://abcd.com/Images/bus.png", nil]; 

if([Arr count]) 

{ 

for (NSString *str in Arr) 

    { 
     if([str isEqualToString:@"Welcome"]) 

     { 
      NSLog(@"str is %@",str); 

      //do whatever you want 
     } 

     if([str isEqualToString:@"http://abcd.com/Images/bus.png"]) 

     { 
      NSLog(@"str is %@",str); 

      //do whatever you want 
     } 
    } 
} 

Answer 4

Tr這樣

NSMutableArray *Arr=[[NSMutableArray alloc]initWithObjects:@"Welcome", @"http://abcd.com/Images/bus.png",nil]; 

    NSString *st=nil; 
    for(NSString *string in Arr) 
    { 
    NSArray *matches = [detector 
       matchesInString:string 
            options:0 
             range:NSMakeRange(0,  
            [string length])]; 
    for (NSTextCheckingResult *match in 
      matches) { 
      if ([match resultType] ==  
     NSTextCheckingTypeLink) { 
     NSURL *url = [match URL]; 
     } else 
     { 
     NSlog(@"it is a string"); 
     } 
    } 

}