走进swfit（二）CGRectMake

btn.frame = CGRectMake(i*(320/tabArray.count), 0, 320/tabArray.count, 49);

但是到了swift里这么来写是行不通的，编译不通过，找了下写法如下

var button:UIButton = UIButton()
            var z = (idx)*135
            var c = CGFloat(z)
            var x:CGFloat = 107.0 + c
            var frame = CGRectMake(x, 20, 135, 53)
            button.frame = frame

OC写法：

[NSString stringWithFormat:@"%.2ld",(long)row];

swift中的写法：

NSString(format: "tabbar_unselected%d",idx)

走进swfit（二）CGRectMake

原文：http://blog.csdn.net/quanqinyang/article/details/43679959