IT___power的专栏

//如果对象是可变的(NSMutableString), 调用方法之后, 可变字符串对象本身可能变,也可能不变 NSMutableString *mStr1 = [NSMutableString stringWithString:@"文艺青年"];//可变字符串 NSString *mStrResult = [mStr1 stringByReplacingOccurrences

关于UIButton的一些常用资料: //创建按钮 UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom]; /* UIButtonType 按钮类型:(前两种是常用类型) UIButtonTypeCustom = 0,