How to programmatically rotate image by 90 Degrees in iPhone?

Question

Possible Duplicate:
How to Rotate a UIImage 90 degrees?

score 75 · Accepted Answer · edited Feb 26 '13 at 15:58

75

//create rect
UIImageView *myImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"my_image.png"]];

//set point of rotation
myImageView.center = CGPointMake(100.0, 100.0);

//rotate rect
myImageView.transform = CGAffineTransformMakeRotation(M_PI_2); //rotation in radians

edited Feb 26 '13 at 15:58

FreeAsInBeer

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answered Apr 07 '11 at 12:50

Sabobin

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Almost perfect answer. Just that you gave rotation by 180 degrees and I wanted by 90 degrees but apart from that it is exactly what I needed. Thanks a lot. :) – Parth Bhatt Apr 08 '11 at 05:04
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Use `M_PI` instead of `3.14159265`, and `M_PI_2` instead of `M_PI/2` – Matoe Aug 28 '12 at 02:01

score 5 · Answer 2 · edited May 23 '17 at 10:31

5

see this:

Rotate image in Quartz? Image is upside down! (iPhone)

 myImage.center = CGPointMake(0, 0);
 myImage.transform = CGAffineTransformMakeRotation([degreesToRadians:imageRotationFix]);

edited May 23 '17 at 10:31

Community

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answered Apr 07 '11 at 12:49

Ahmad Kayyali

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score 4 · Answer 3 · answered Apr 07 '11 at 12:48

this code will rotate the button..

UIButton *btn=[UIButton buttonWithType:UIButtonTypeRoundedRect];
[btn setFrame:CGRectMake(100, 100, 200, 44)];
btn.transform=CGAffineTransformMakeRotation(M_PI / -4);
[btn setTitle:@"RakeshBhatt" forState:UIControlStateNormal];
[self.view addSubview:btn];

same way u can rotate imageview.

How to programmatically rotate image by 90 Degrees in iPhone?

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