使用If语句初始化图像

Question

因此，我有一个字典，其中存储在所有100个位置的数字0，但我想然后使用这些0初始化100图像没有图像。稍后当不同的数字替换存储的0（即1）时图像将改变。我有以下的代码，而这一切工作，直到最后一行：

NSMutableDictionary *myDict = [[NSMutableDictionary alloc] init]; 

for (int i = 1; i <= 100; i ++) { 
    if(myDict) 
    { 
     [myDict setObject:[NSNumber numberWithInt:0] forKey:[NSString stringWithFormat:@"block%.3istored",i]]; 
    } 
} 
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
NSString *documentPath = [paths objectAtIndex:0]; 
NSString *path = [documentPath stringByAppendingPathComponent:@"blocks.save"]; 
BOOL successfulWrite = [myDict writeToFile: path atomically: YES]; 
if(successfulWrite == NO); 

[myDict setObject:[NSNumber numberWithInt:1] forKey:@"block002stored"]; 

for (int z = 1; z <= 100; z ++) { 

    NSString *mapblock=@"mapblock"; 
    NSString *blocktocheck=[mapblock stringByAppendingFormat:@"%d",z]; 

    NSLog(@"%d", z); 
    NSLog(@"%@", blocktocheck); 

    {if (forKey:@"block%.3zstored" == 0) [@"%@", blocktocheck].image = [[UIImage imageNamed:@""]; 

}

任何帮助，将不胜感激。

Answer 1

2件事。

1. 你错过了对象发送检查... >>如果（forKey：@ “块....

2. 您需要设置一个有效的密钥>> @” 块％.3zstored “

将其更改为

for (int z = 1; z <= 100; z ++) { 
    NSString *mapblock=@"mapblock"; 
    NSString *blocktocheck=[mapblock stringByAppendingFormat:@"%d",z]; 
    id key = blocktocheck; 

    if ([myDict objectForKey:key] == nil) { 
     [myDict setObject:img forKey:key]; 
    } 
}