XZ_iOS之转换坐标系

// 蓝色

UIView *blue = [[UIViewalloc]init];

blue.backgroundColor = [UIColorblueColor];

blue.frame = CGRectMake(0,50,100,100);

[self.viewaddSubview:blue];

// 红色

UIView *red = [[UIViewalloc]init];

red.backgroundColor = [UIColorredColor];

red.frame = CGRectMake(100,150,100,100);

[self.viewaddSubview:red];

CGRect newRect = [red convertRect:CGRectMake(50,50,50,50) toView:blue];

// 以字符串的形式打印转换完的坐标

NSLog(@"%@",NSStringFromCGRect(newRect));

结果打印：