Objective-C 常用代碼

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這裡會歸納一些在Objective-C開發中常用的代碼 代碼會慢慢增多  =）產生一定範圍的隨機數Objective-C

-(float)RandomFloatStart:(float)a end:(float)b {        srand((unsigned)time(0));        float random = ((float) rand()) / (float) RAND_MAX;        float diff = b - a;        float r = random * diff;        return a + r;}

　　

 

驗證郵箱是否合法

 

- (BOOL) validEmail:(NSString*) emailString {      if([emailString length]==0){         return NO;      }       NSString *regExPattern = @"[A-Z0-9a-z._%+-][email protected][A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";       NSRegularExpression *regEx = [[NSRegularExpression alloc] initWithPattern:regExPattern       options:NSRegularExpressionCaseInsensitive error:nil];      NSUInteger regExMatches = [regEx numberOfMatchesInString:emailString options:0 range:NSMakeRange(0, [emailString length])];       NSLog(@"%i", regExMatches);      if (regExMatches == 0) {          return NO;      } else {          return YES;      }}

　　

  

 

判斷手機是否越獄

 

+(BOOL)isJailbroken {      NSString *filePath = @"/Applications/Cydia.app";      if ([[NSFileManager defaultManager] fileExistsAtPath:filePath])      {            return YES;      } else {            return NO;      }}

 

or

 

+(BOOL)isJailbroken {      FILE *f = fopen("/bin/bash", "r");      BOOL isbash = NO;      if (f != NULL) {            //Device is jailbroken            isbash = YES;      }      fclose(f);}

　　

Objective-C 常用代碼