1.用三種方式生成內(nèi)容為1嵌施、2犁柜、3的可變數(shù)組
NSMutableArray* arr = [NSMutableArray arrayWithObjects:@1,@2,@3,nil];
NSMutableArray* arr = [@[@1,@2,@3] mutableCopy];
NSMutableArray* arr = [NSMutableArray arrayWithArray:@[@1,@2,@3]];
NSMutableArray* arr = [NSMutableArray arrayWithObjects:@1,@2,@3,nil];
NSMutableArray* arr = [@[@1,@2,@3] mutableCopy];
NSMutableArray* arr = [NSMutableArray arrayWithArray:@[@1,@2,@3]];