obj-c 2.0增加了許多核心對象字面量的簡單語法，向ruby學習嗎？
直接上代碼：

#import <Foundation/Foundation.h>int main(void){@autoreleasepool{NSString *str0 = @"hello";NSString *str1 = [NSString stringWithFormat:@"%@",@"hello"];NSLog(@"%@ %@",str0,str1);if(str0 == str1)NSLog(@"str0 == str1");if([str0 isEqual:str1])NSLog(@"str0 equal str1");if([str0 compare:str1] == NSOrderedSame)NSLog(@"str0 compare str1 is Same");NSMutableSet *set = [NSMutableSet new];NSLog(@"count %lu at begin",[set count]);[set addObject:str0];[set addObject:str1];[set addObject:[str0 stringByAppendingString:str1]];NSLog(@"count %lu at now",[set count]);NSLog(@"%@",set);//NSLog(@"%@ %@",set[0],set[2]);NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];[dict setDictionary:@{@1:@1,@2:@"hh",@"hi":@1}];dict[@11] = @"what!?";NSLog(@"%@ : %@",dict[@1],dict);NSMutableArray *ary = [NSMutableArray arrayWithArray:@[@1,@2,@"hehe"]];NSLog(@"%@",ary);ary[2] = @"smile!";NSLog(@"%@ : %@",ary[0],ary);@try{NSLog(@"value with bad index: %@",ary[11]);NSLog(@"never see me!");}@catch(NSException *e){NSLog(@"caught %@:%@",[e name],[e reason]);}@finally{NSLog(@"at last!!!");}}return 0; }

總結

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