自定义一个searchBar

#import "CZSearchBar.h"

@implementation CZSearchBar

- (instancetype)initWithFrame:(CGRect)frame

{

if (self = [super initWithFrame:frame]) {

self.font = [UIFont systemFontOfSize:13];

self.background = [UIImage imageWithStretchableName:@"searchbar_textfield_background"];

// 设置左边的view

// initWithImage:默认UIImageView的尺寸跟图片一样

UIImageView *imageV = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"searchbar_textfield_search_icon"]];

imageV.width += 10;

imageV.contentMode = UIViewContentModeCenter;

self.leftView = imageV;

// 一定要设置，想要显示搜索框左边的视图，一定要设置左边视图的模式

self.leftViewMode = UITextFieldViewModeAlways;

}

return self;

}

@end