iOS NSString追加字串的方法，iosnsstring

iOS NSString追加字串的方法，iosnsstring

第一種:

 NSArray *array = [NSArray arrayWithObjects:@"Hello",@" ",@"world", @"!", nil]; NSString *printStr = @""; for(int i = 0; i < [array count]; i++){     printStr = [printStr stringByAppendingFormat:@"%@", [array objectAtIndex:i]]; } NSLog(@"第一種方法%@", printStr);

第二種:

 NSArray *array = [NSArray arrayWithObjects:@"Hello",@" ",@"world", @"!", nil]; NSMutableString *printStr2 = [[NSMutableString alloc] init]; for(int i = 0; i < [array count]; i++){      [printStr2 appendFormat:@"%@", [array objectAtIndex:i]]; } NSLog(@"第二種方法%@", printStr2);

輸出結果:

2015-06-01 21:33:52.964 String追加字串[28638:601104] 第一種方法Hello world!2015-06-01 21:33:52.965 String追加字串[28638:601104] 第二種方法Hello world!