uibutton.m

self.button.titleLabel.numberOfLines = 0;
// be careful, don't set this. If you set this, content insets won't work
// for title.
// self.button.titleLabel.textAlignment = NSTextAlignmentLeft;
[self.button.titleLabel sizeToFit];
[self.button setAttributedTitle:mutableAttributedString forState:UIControlStateNormal];
self.button.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft;
self.button.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;

UIImage *icon = [[UIImage imageNamed:@"btn"] imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
[self.button setImage:icon forState:UIControlStateNormal];

// setting the insets
self.button.contentEdgeInsets = UIEdgeInsetsMake(0, 100.0f, 0, 0);
self.button.titleEdgeInsets = UIEdgeInsetsMake(0, 50.0f, 0, 0);