NSString *imagePath = [skinPath stringByAppendingString:[NSString stringWithFormat:@"/%@",imageName]];//stringByAppendingString是在skinPath加后綴的意思
NSString *imagePath = [skinPath stringByAppendingPathComponent:imageName];//stringByAppendingPathComponent是在skinPath后面加上“/”號(hào)連接imageName讓它成為完整的路徑
NSLog(@"imagePath:%@",imagePath);