AllInOrNothing的专栏

#import "ViewController.h" #define SCREENWIDTH [UIScreen mainScreen].bounds.size.width #define SCREENHEIGHT [UIScreen mainScreen].bounds.size.height @interface ViewController () {

/// 自定义UITextField class JKTextField: UITextField{ /// 传入frame var placeholderFrame:CGRect? /// 设置placeholderframe override func placeholderRectForBounds(bounds: CGRect) -> CGRec