Object C (2) --- NSString的创建

时间：2014-05-02 09:04:17 收藏：0 阅读：185

NSString *str1 = @"a string";

NSString *str2 = [[NSString alloc] init];

str2 = @"a string";

[str2 release];

NSString *str3 = [[NSString alloc] initWithString:@"a string"];

[str3 release];

NSString *str4 = [NSString stringWithString:@"a string"];

[str4 release];

NSString *str5 = [[NSString alloc] initWithUTF8String:"a string"];

[str5 release];

NSString *str6 = [NSString stringWithUTF8String:"a string"];

NSString *str7 = [NSString stringWithFormat:@"a string %d", 5];

NSLog(@"%@",str7);