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NSArray *helloWorld = @[@"world",@"hello"];
NSString *hello_Constant = @"hello";
NSString *helloFConstant = [NSString stringWithFormat:@"hello"];
NSString *helloFormate1 = [NSString stringWithFormat:@"%@",hello_Constant];
NSString *helloFormate2 =[NSString stringWithFormat:@"%@llo",@"he"];
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原文地址：http://www.cnblogs.com/binglin92/p/4415981.html
