iOS Development--animation---Chronograph timer

Timer Timer

To design a timing timer:

1, create variable array, hold 0~100 number

2, create a 0~100 number with a for loop and put it in a mutable array

3, create timer: Create timer: Parameter 1: Set time interval, parameter 2: target, Parameter 3: Timer binding method, Parameter 4: supplementary information, general null; parameter 5: Repeat

_timer = [nstimerscheduledtimerwithtimeinterval:0.1target:self selector: @selector (outPut) UserInfo:nilrepeats:YES] ;

4, Timer Stop method: If statement to determine whether the timer is empty

if (_timer! = nil)

5, read data method: Create static variable, use index to read data

static int count = 0;

NSString * str =[_array objectatindex:count];

NSLog (@ "-----%@", str);

Count + +;

6, prevent array from overstepping

if (count>99) {

count=0;

}

7, Timer destruction

[_timer invalidate];

iOS Development--animation---Chronograph timer