CocoaChina 会员“”分享的几个 CGRect 函数例子，希望对您的苹果开发有所帮助

1.CGRectOffset使用从源CGRect偏移的原点来创建矩形

    float offset = 25.0;
    CGRect r1 = CGRectMake(100, 100, 100, 100);
    CGRect r2 = CGRectOffset(r1, offset, offset);

2.CGRectIntersectsRect允许我们确定两个矩形是否相交

    float offset = 25.0;
    CGRect r1 = CGRectMake(100, 100, 100, 100);
    CGRect r2 = CGRectMake(150, 150, 100, 100);
    if (CGRectIntersectsRect(r1, r2)) Read More