关于自定义view

init会调用initWithFrame
自定义逻辑放在initWithFrame；不要放在init；不要两个方法都放。

一：使用

// .h
#import <UIKit/UIKit.h>
@interface BookmarkMainBackView : UIView
@end

// .m
@implementation BookmarkMainBackView
CF_CUSTOMERVIEW_VIEW
- (void)bankViewInit{
}
@end

二：实现

// 自定义 UIView (小心继承导致的bankViewInit覆盖)
#ifndef CF_CUSTOMERVIEW_VIEW
#define CF_CUSTOMERVIEW_VIEW \
- (instancetype)initWithCoder:(NSCoder *)aDecoder{\
    self = [super initWithCoder:aDecoder];\
    if (self) {\
        self.userInteractionEnabled = YES;\
        [self bankViewInit];\
    }\
    return self;\
}\
- (instancetype)initWithFrame:(CGRect)frame{\
    self = [super initWithFrame:frame];\
    if (self) {\
        self.userInteractionEnabled = YES;\
        [self bankViewInit];\
    }\
    return self;\
}
#endif