判断图片 & 判断URL , 使用分类实现

来源：互联网发布：淘宝应用开发编辑：程序博客网时间：2024/06/06 01:35

main.m

#import "NSString+isImage.h"#import "NSString+isURL.h"#import <Foundation/Foundation.h>void image(NSString * image){if ([image isImage]) {NSLog(@"是图片");}else {NSLog(@"不是图片");}}void url(NSString * url){if ([url isURL]) {NSLog(@"是网址");}else {NSLog(@"不是网址");}}int main(int argc, const char * argv[]){@autoreleasepool {NSString * url1 = @"http://www.baidu.com";NSString * url2 = @"https://www.taobao.com";url(url1);url(url2);NSString * image1 = @"bizhi.jpg";NSString * image2 = @"bizhi.png";NSString * image3 = @"bizhi.jpeg";NSString * image4 = @"bizhi.gif";image(image1);image(image2);image(image3);image(image4);}return 0;}

NSString+isURL.h

#import <Foundation/Foundation.h>@interface NSString (isURL)-(BOOL)isURL;@end

NSString+isURL.m

#import "NSString+isURL.h"@implementation NSString (isURL)- (BOOL)isURL{return ([self hasPrefix:@"http://"] || [self hasPrefix:@"https://"]);}@end

NSString+isImage.h

#import <Foundation/Foundation.h>@interface NSString (isImage)- (BOOL)isImage;@end

NSString+isImage.m

#import "NSString+isImage.h"@implementation NSString (isImage)- (BOOL)isImage{return [self hasSuffix:@".jpg"] || [self hasSuffix:@".png"] || [self hasSuffix:@".jpeg"] || [self hasSuffix:@".gif"];}@end

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