简述Objective-C的优缺点。
简述Objective-C的优缺点。
相关考题：
单选题使用Objective-C语言输出“This is a Objective-Cprogram.”正确的是（）ANSLog(@%s,This isa Objective-C program.);BNSLog(@%@,This isa Objective-C program.);CNSLog(@This is aObjective-C program.,%@);DNSLog(@This is a Objective-Cprogram.);
问答题简述播种造林的优缺点？植苗造林的优缺点？