Objective-c Common Code

This will summarize some of the code code used in OBJECTIVE-C development will slowly increase =) generate a certain range of random numbersobjective-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;}

　　

Verify that the mailbox is legitimate

-(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;}      }

　　

Determine if the phone is jailbroken

+ (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 Common Code